Public Key Infrastructure (PKI)

Size: px
Start display at page:

Download "Public Key Infrastructure (PKI)"

Transcription

1 Public Key Infrastructure (PKI) In this video you will learn the quite a bit about Public Key Infrastructure and how it is used to authenticate clients and servers. <Click> The purpose of Public Key Infrastructure is to create and distribute X.509 digital certificates to trusted entities, and then to act as a trusted 3 rd party in that each of the entities trust the 3 rd party, therefore, each entity should trust each other. Basically, it enables cryptographic authentication over an untrusted network. The Software Defined Perimeter and PrecisionAccess use PKI for the mutual authentication of clients to controllers, clients to gateways, and gateways to controllers. Basically, all trust in the Software Defined Perimeter is derived from PKI. Importantly, the Software Defined Perimeter performs mutual authentication, not just the single ended authentication performed by the great majority of servers today. So, how does it work? Well, here s the short version. <Click> PKI defines a Certificate Authority, which will generate and sign X.509 digital certificates and distribute them to clients, servers, and users (but we won t be talking about users in this video). In order to receive a digital certificate, <Click> an entity must communicate with the Certificate Authority and prove that it is trustworthy. Somewhere in this communication, <Click> an asymmetric key pair will be generated. The key pair can be generated by the server, by the Certificate Authority, or by some other computer. The important parts are that the private key remains private and that the public key be signed by the Certificate Authority. In addition, the server <Click> will download the root certificate of the Certificate Authority, and the server will trust any certificate that was either directly or indirectly signed by this root. In order to perform mutual authentication, <Click> the client must also communicate with the Certificate Authority and prove that it is trustworthy. Like the server, <Click> it will then end up with both a private key and a public key, the later of which was put into an X.509 digital certificate and signed by the Certificate Authority. And, <Click> if will also get the trusted root certificate. With that infrastructure in place, <Click> the client and server can mutually authenticate each other over an untrusted network using protocols such as TLS (also known as SSL). OK, that was the short version. How about the long version? Well, we have to start <Click> with the initialization of the PKI Certificate Authority. For this, <Click> we need a server and <Click> a key pair. Here, the red key is the private key (it s red because we need to stop anyone else from seeing it), and the green key is the public key (go ahead and look at this one). The Certificate Authority will generate <Click> a root X.509 digital certificate from a template defined by the owner of the Public Key Infrastructure. Like all X.509 certificates, the root will have a subject and an issuer. The subject is the holder of the private key, and the issuer is the Certificate Authority that issued the certificate. For the

2 root certificate, and only for the root certificate, the subject and the issuer will be the same entity and have the same common name. Next, <Click> the public key is put into the certificate. Then, we need to cryptographically prove that nothing on the certificate has been altered. To do this, we <Click> hash the entire certificate, and, then, <Click> encrypt the hash with the Certificate Authority s private key. Together, hashing and encrypting are known as signing. As we will see in a minute, certificates that are derived from the root, can be cryptographically proven to be reliable, but we need a mechanism by which certificates can be revoked, and that one entity validating another entity s certificate can check whether or not the certificate has been revoked. To do that <Click> PKI invented the On- line Certificate Status Protocol responder, or OCSP responder, for short. The OCSP responder <Click> reaches out to the Certificate Authority and gets its list of revoked certificates, know as the Certificate Revocation List, or CRL s, or crils. At that point, the Certificate Authority has been set up and <Click> the X.509 certificate has been created. Now, the Certificate Authority can begin to ack as a trusted 3 rd party. We will begin <Click> by providing a private key and certificate to the server. As before, <Click> we start with a key pair, and, through a process called a Certificate Signing Request, or CSR, <Click> we give the public key to the Certificate Authority. The Certificate Authority <Click> generates a certificate from a template specifically for server certs. Note that here the subject and issuer are different. The subject is the entity that will end up with the certificate and the issuer is the Certificate Authority. The Certificate Authority <Click> puts the servers public key in the cert. Then, as before, <Click> we hash the cert, and encrypt the hash, <Click> with the private key of the Certificate Authority, and, <Click> return the certificate to the server. With our Public Key Infrastructure in place, let s take a look at how it is typically used on the Internet. We should note that what you are about to see is not exactly how PKI is used for the Software Defined Perimeter because it will lack mutual authentication. However, a later video will fully explain that handshake in detail. OK, <Click> let s look at the PKI part of a simple TLS handshake. Before the handshake can begin, the client must have downloaded <Click> the root certificate of the Public Key Infrastructure. Note that browsers download hundreds of root certificates as part of the browser installation process, and, in a minute, we ll see how that is a significant problem for PKI, and we ll see how Vidder and the Software Defined Perimeter fix that problem. But, we re getting ahead of ourselves. The PKI part of the TLS handshake begins <Click> with the server sending the server s certificate to the client. Now, the client must validate the authenticity of the certificate, to do this, <Click> it takes a hash of the certificate using the same hash algorithm as the signer used (it knows how to do this because the method is written on the certificate). Then, <Click> it decrypts the original hash using asymmetric key encryption, and checks if the two hashes are equal. If so, then the client knows that it has a valid certificate. It also knows that the certificate has not expired because the expiration time is on the certificate. However, it doesn t know whether or not the certificate has been revoked. Therefore, <Click> it gets the serial number from the certificate, and <Click>

3 sends it to the OCSP responder. Assuming the certificate has not been revoked, <Click> the OCSP responder will mark it as Good, and put that reply <Click> in an OCSP response, along with the serial number, and <Click> will sign the response. Note that his is not an X.509 certificate. Rather this is an OCSP signed response as defined by RFC. The OCSP responder, then, <Click> returns the response to the client. The client <Click> hashes the content of the message, decrypts the original hash, and, assuming they are equal, determines that the certificate has not been revoked, and, that, therefore, it can be trusted. Well, we ve certainly talked a lot about X.509 certificates. Let s open one up and take a look at it. <Click> Here s the 1 st half, and <Click> here s the rest of it. This happens to be the certificate for an SDP Client, and <Click> here s the client s Universal ID, which will also be the subject of the certificate. But first, <Click> note that this certificate is not trusted by my computer. That s because the Software Defined Perimeter uses a dedicated PKI with pinned certificates, which solves a number of problems associated with PKI, as we ll see in a minute. <Click> Here s the subject with the common name of the Client s UID, <Click> and the issuer with the common name of the root of this Software Defined Perimeter. Next, <Click> the serial number, which we just saw is used for checking its revocation status, among other things. And, <Click> here is its public key. Recall that when you can decrypt something with this public key, then you can cryptographically prove that it was encrypted with the associated private key, and, assuming the private key has not been stolen, discovered, or compromise by an adversary, and that the infrastructure with access to that key was not compromised either, and the certificate is valid, has not expired, and has not been revoked, then, you can trust it is associated with the entity named in the subject, above. Another attribute of a certificate <Click> is what the private key can be used to encrypt. The RFC shown here lists the possibilities, but the important thing to note is that the private key associated with this certificate cannot be used to generate certificates. Finally, the issuer of this certificate <Click> would have hashed the entire certificate and encrypted that hash with its private key. Note that there are two pairs of keys being discussed here. The key pair associated with this certificate has the public key on this certificate and the private key is held by the SDP client. However, the private key that was used to sign this certificate is held by the issuing Certificate Authority. If this is not clear, please go back to the previous slides to see how trust is conferred from the Certificate Authority to the server. If you talk with enough people about PKI, someone is bound to say that PKI is Broken. Well, <Click> is PKI broken? Well, <Click> no the technology is sound. But <Click> is it broken in some other way. Well, yes, it is. Previously, we talked about how the installation of a browser downloads hundreds of trusted root certificates. Any compromise in the chain of certificates to the root means a compromised PKI. That s what happened to Google when Iranian hackers compromised DigiNotar s issuing CA and issued certificates to the hackers that cryptographically proved they represented Google. Similarly, there s an attack known as a root cert injection attack, resulting in the victim s computer trusting the attacker for all certificates presented to the victim. In addition, for servers on the Internet,

4 the subject s common name in the server s certificate, is a name, not an IP address. Therefore, DNS spoofing can enable man- in- the- middle attacks. Finally, the fact that the PKI infrastructure enables revocation checking, also opens up a denial of service attack by flooding the OCSP responder with lots of requests. If the OCSP responder cannot reply to legitimate requests, the DoS attack effectively shuts down the servers using that PKI infrastructure. Wow. But, <Click> does Vidder fix those problems? Well, yes, Vidder does fix those problems. It uses a dedicated PKI with pinned certificates which means the SDP client won t trust the hundreds of root Certificate Authorities out there it will only trust the dedicated PKI associated with this specific Software Defined Perimeter. That also means that injecting additional certs won t affect SDP because the root cert of the SDP is not stored with the other root certs. Rather it is encrypted and stored outside of the certificate store. In addition, the common name of the Controllers and gateways is an IP address, which mitigates spoofing attacks. Finally, the Software Defined Perimeter s OCSP responder uses OCSP stapling, where the OCSP response is pre- fetched by the controller and sent to the clients during the TLS handshake. Therefore, the OCSP responder is not open to the Internet, and, therefore, not DoS able. OK, there was a lot of material here. Let s summarize. <Click> The purpose of Public Key Infrastructure is to create and distribute X.509 digital certificates to trusted entities, and then to act as a trusted 3 rd party in that each of the entities trust the 3 rd party, therefore, each entity should trust each other. Basically, it enables cryptographic authentication over an untrusted network. A PKI implementation consists of a root certificate authority that has a certificate whose subject names and issuer names are the same. All other certificates were signed directly or indirectly by it. Everyone inherently trusts the root. Certificates can be cryptographically proven to be valid and not revoked. The signature on the cert makes it possible to prove that the cert has not been altered. Recall that the signature consists of a hash of the rest of the certificate and then the encrypting of that hash with the issuing certificate authority s private key. PKI creates a chain of trust all the way back to the root certificate. Every link in the chain must be validated, but there is no way to validate the root it is inherently trusted. You will hear that the public implementation of PKI is broken, but the technology is not broken and SDP s implementation fixes the pieces that are broken in the public implementation.

5

User Guide Supplement. S/MIME Support Package for BlackBerry Smartphones BlackBerry Pearl 8100 Series

User Guide Supplement. S/MIME Support Package for BlackBerry Smartphones BlackBerry Pearl 8100 Series User Guide Supplement S/MIME Support Package for BlackBerry Smartphones BlackBerry Pearl 8100 Series SWD-292878-0324093908-001 Contents Certificates...3 Certificate basics...3 Certificate status...5 Certificate

More information

SSL/TLS: The Ugly Truth

SSL/TLS: The Ugly Truth SSL/TLS: The Ugly Truth Examining the flaws in SSL/TLS protocols, and the use of certificate authorities. Adrian Hayter CNS Hut 3 Team adrian.hayter@cnsuk.co.uk Contents Introduction to SSL/TLS Cryptography

More information

Key Management and Distribution

Key Management and Distribution Key Management and Distribution Overview Raj Jain Washington University in Saint Louis Saint Louis, MO 63130 Jain@cse.wustl.edu udio/video recordings of this lecture are available at: http://www.cse.wustl.edu/~jain/cse571-14/

More information

Key Management. CSC 490 Special Topics Computer and Network Security. Dr. Xiao Qin. Auburn University http://www.eng.auburn.edu/~xqin xqin@auburn.

Key Management. CSC 490 Special Topics Computer and Network Security. Dr. Xiao Qin. Auburn University http://www.eng.auburn.edu/~xqin xqin@auburn. CSC 490 Special Topics Computer and Network Security Key Management Dr. Xiao Qin Auburn University http://www.eng.auburn.edu/~xqin xqin@auburn.edu Slide 09-1 Overview Key exchange Session vs. interchange

More information

Brocade Engineering. PKI Tutorial. Jim Kleinsteiber. February 6, 2002. Page 1

Brocade Engineering. PKI Tutorial. Jim Kleinsteiber. February 6, 2002. Page 1 PKI Tutorial Jim Kleinsteiber February 6, 2002 Page 1 Outline Public Key Cryptography Refresher Course Public / Private Key Pair Public-Key Is it really yours? Digital Certificate Certificate Authority

More information

Key Management and Distribution

Key Management and Distribution Key Management and Distribution Raj Jain Washington University in Saint Louis Saint Louis, MO 63130 Jain@cse.wustl.edu Audio/Video recordings of this lecture are available at: http://www.cse.wustl.edu/~jain/cse571-11/

More information

1. Lifecycle of a certificate

1. Lifecycle of a certificate 1 1. Lifecycle of a certificate 1. Client generates Signing Request (CSR) in his secure computer or server where application will be used. Now client has two s a CSR (usually with CSR extension but it

More information

[SMO-SFO-ICO-PE-046-GU-

[SMO-SFO-ICO-PE-046-GU- Presentation This module contains all the SSL definitions. See also the SSL Security Guidance Introduction The package SSL is a static library which implements an API to use the dynamic SSL library. It

More information

Overview of CSS SSL. SSL Cryptography Overview CHAPTER

Overview of CSS SSL. SSL Cryptography Overview CHAPTER CHAPTER 1 Secure Sockets Layer (SSL) is an application-level protocol that provides encryption technology for the Internet, ensuring secure transactions such as the transmission of credit card numbers

More information

Certificates. Noah Zani, Tim Strasser, Andrés Baumeler

Certificates. Noah Zani, Tim Strasser, Andrés Baumeler Certificates Noah Zani, Tim Strasser, Andrés Baumeler Overview Motivation Introduction Public Key Infrastructure (PKI) Economic Aspects Motivation Need for secure, trusted communication Growing certificate

More information

Understanding Digital Certificates and Secure Sockets Layer (SSL)

Understanding Digital Certificates and Secure Sockets Layer (SSL) Understanding Digital Certificates and Secure Sockets Layer (SSL) Author: Peter Robinson January 2001 Version 1.1 Copyright 2001-2003 Entrust. All rights reserved. Digital Certificates What are they?

More information

SSL Protect your users, start with yourself

SSL Protect your users, start with yourself SSL Protect your users, start with yourself Kulsysmn 14 december 2006 Philip Brusten Overview Introduction Cryptographic algorithms Secure Socket Layer Certificate signing service

More information

HTTPS is Fast and Hassle-free with CloudFlare

HTTPS is Fast and Hassle-free with CloudFlare HTTPS is Fast and Hassle-free with CloudFlare 1 888 99 FLARE enterprise@cloudflare.com www.cloudflare.com In the past, organizations had to choose between performance and security when encrypting their

More information

Dr. Cunsheng DING HKUST, Hong Kong. Security Protocols. Security Protocols. Cunsheng Ding, HKUST COMP685C

Dr. Cunsheng DING HKUST, Hong Kong. Security Protocols. Security Protocols. Cunsheng Ding, HKUST COMP685C Cunsheng Ding, HKUST Lecture 06: Public-Key Infrastructure Main Topics of this Lecture 1. Digital certificate 2. Certificate authority (CA) 3. Public key infrastructure (PKI) Page 1 Part I: Digital Certificates

More information

Entrust Managed Services PKI. Getting started with digital certificates and Entrust Managed Services PKI. Document issue: 1.0

Entrust Managed Services PKI. Getting started with digital certificates and Entrust Managed Services PKI. Document issue: 1.0 Entrust Managed Services PKI Getting started with digital certificates and Entrust Managed Services PKI Document issue: 1.0 Date of issue: May 2009 Copyright 2009 Entrust. All rights reserved. Entrust

More information

Certificate Management. PAN-OS Administrator s Guide. Version 7.0

Certificate Management. PAN-OS Administrator s Guide. Version 7.0 Certificate Management PAN-OS Administrator s Guide Version 7.0 Contact Information Corporate Headquarters: Palo Alto Networks 4401 Great America Parkway Santa Clara, CA 95054 www.paloaltonetworks.com/company/contact-us

More information

What Are Certificates?

What Are Certificates? The Essentials Series: Code-Signing Certificates What Are Certificates? sponsored by by Don Jones W hat Are Certificates?... 1 Digital Certificates and Asymmetric Encryption... 1 Certificates as a Form

More information

Securing your Online Data Transfer with SSL

Securing your Online Data Transfer with SSL Securing your Online Data Transfer with SSL A GUIDE TO UNDERSTANDING SSL CERTIFICATES, how they operate and their application 1. Overview 2. What is SSL? 3. How to tell if a Website is Secure 4. What does

More information

Securing your Online Data Transfer with SSL A GUIDE TO UNDERSTANDING SSL CERTIFICATES, how they operate and their application INDEX 1. Overview 2. What is SSL? 3. How to tell if a Website is Secure 4.

More information

Digital Certificates Demystified

Digital Certificates Demystified Digital Certificates Demystified Alyson Comer IBM Corporation System SSL Development Endicott, NY Email: comera@us.ibm.com February 7 th, 2013 Session 12534 (C) 2012, 2013 IBM Corporation Trademarks The

More information

Contents. Identity Assurance (Scott Rea Dartmouth College) IdM Workshop, Brisbane Australia, August 19, 2008

Contents. Identity Assurance (Scott Rea Dartmouth College) IdM Workshop, Brisbane Australia, August 19, 2008 Identity Assurance (Scott Rea Dartmouth College) IdM Workshop, Brisbane Australia, August 19, 2008 Contents Authentication and Identity Assurance The Identity Assurance continuum Plain Password Authentication

More information

Digital Certificates (Public Key Infrastructure) Reshma Afshar Indiana State University

Digital Certificates (Public Key Infrastructure) Reshma Afshar Indiana State University Digital Certificates (Public Key Infrastructure) Reshma Afshar Indiana State University October 2015 1 List of Figures Contents 1 Introduction 1 2 History 2 3 Public Key Infrastructure (PKI) 3 3.1 Certificate

More information

Security Digital Certificate Manager

Security Digital Certificate Manager IBM i Security Digital Certificate Manager 7.1 IBM i Security Digital Certificate Manager 7.1 Note Before using this information and the product it supports, be sure to read the information in Notices,

More information

CSA SDP Working Group

CSA SDP Working Group CSA SDP Working Group An Open Source Code Project for a Software Defined Perimeter to Defend Cloud Applications from DDoS CSA Conference - Berlin November 2015 DHS Problem Addressing the Changing Perimeter

More information

Software Defined Perimeter Working Group. SDP Hackathon Whitepaper

Software Defined Perimeter Working Group. SDP Hackathon Whitepaper Software Defined Perimeter Working Group SDP Hackathon Whitepaper April 2014 2014 Cloud Security Alliance All Rights Reserved. All rights reserved. You may download, store, display on your computer, view,

More information

Analyzing DANE's Response to Known DNSsec Vulnerabilities

Analyzing DANE's Response to Known DNSsec Vulnerabilities Analyzing DANE's Response to Known DNSsec Vulnerabilities Matthew Henry Joseph Kirik Emily Scheerer UMBC UMBC UMBC henmatt1@umbc.edu joskir1@umbc.edu semily1@umbc.edu May 9, 2014 Abstract: SSL/TLS is currently

More information

Security Digital Certificate Manager

Security Digital Certificate Manager System i Security Digital Certificate Manager Version 5 Release 4 System i Security Digital Certificate Manager Version 5 Release 4 Note Before using this information and the product it supports, be sure

More information

Network Security. Gaurav Naik Gus Anderson. College of Engineering. Drexel University, Philadelphia, PA. Drexel University. College of Engineering

Network Security. Gaurav Naik Gus Anderson. College of Engineering. Drexel University, Philadelphia, PA. Drexel University. College of Engineering Network Security Gaurav Naik Gus Anderson, Philadelphia, PA Lectures on Network Security Feb 12 (Today!): Public Key Crypto, Hash Functions, Digital Signatures, and the Public Key Infrastructure Feb 14:

More information

X.509 Certificate Generator User Manual

X.509 Certificate Generator User Manual X.509 Certificate Generator User Manual Introduction X.509 Certificate Generator is a tool that allows you to generate digital certificates in PFX format, on Microsoft Certificate Store or directly on

More information

Computer and Network Security. Outline

Computer and Network Security. Outline Computer and Network Security Lecture 10 Certificates and Revocation Outline Key Distribution Certification Authorities Certificate revocation 1 Key Distribution K A, K B E KA ( K AB, E KB (KAB) ) K A

More information

KEY DISTRIBUTION: PKI and SESSION-KEY EXCHANGE. Mihir Bellare UCSD 1

KEY DISTRIBUTION: PKI and SESSION-KEY EXCHANGE. Mihir Bellare UCSD 1 KEY DISTRIBUTION: PKI and SESSION-KEY EXCHANGE Mihir Bellare UCSD 1 The public key setting Alice M D sk[a] (C) Bob pk[a] C C $ E pk[a] (M) σ $ S sk[a] (M) M, σ Vpk[A] (M, σ) Bob can: send encrypted data

More information

7 Key Management and PKIs

7 Key Management and PKIs CA4005: CRYPTOGRAPHY AND SECURITY PROTOCOLS 1 7 Key Management and PKIs 7.1 Key Management Key Management For any use of cryptography, keys must be handled correctly. Symmetric keys must be kept secret.

More information

Instructions on TLS/SSL Certificates on Yealink Phones

Instructions on TLS/SSL Certificates on Yealink Phones Instructions on TLS/SSL Certificates on Yealink Phones 1. Summary... 1 2. Encryption, decryption and the keys... 1 3. SSL connection flow... 1 4. The instructions to a certificate... 2 4.1 Phone acts as

More information

Overview. SSL Cryptography Overview CHAPTER 1

Overview. SSL Cryptography Overview CHAPTER 1 CHAPTER 1 Note The information in this chapter applies to both the ACE module and the ACE appliance unless otherwise noted. The features in this chapter apply to IPv4 and IPv6 unless otherwise noted. Secure

More information

Certificate Authorities and Public Keys. How they work and 10+ ways to hack them.

Certificate Authorities and Public Keys. How they work and 10+ ways to hack them. Certificate Authorities and Public Keys How they work and 10+ ways to hack them. -- FoxGuard Solutions Www.FoxGuardSolutions.com melkins@foxguardsolutions.com Version.05 9/2012 1 Certificate Use Overview

More information

Software Defined Perimeter: Securing the Cloud to the Internet of Things

Software Defined Perimeter: Securing the Cloud to the Internet of Things Software Defined Perimeter: Securing the Cloud to the Internet of Things SESSION ID: CDS-T08 Jim Reavis Chief Executive Officer Cloud Security Alliance @cloudsa About Cloud Security Alliance Global, not-for-profit

More information

CSE543 - Introduction to Computer and Network Security. Module: Public Key Infrastructure

CSE543 - Introduction to Computer and Network Security. Module: Public Key Infrastructure CSE543 - Introduction to Computer and Network Security Module: Public Key Infrastructure Professor Trent Jaeger 1 Meeting Someone New Anywhere in the Internet 2 What is a certificate? A certificate makes

More information

Extended SSL Certificates

Extended SSL Certificates Introduction Widespread usage of internet has led to the growth of awareness amongst users, who now associate green address bar with security. Though people are able to recognize the green bar, there is

More information

SSL Interception Proxies. Jeff Jarmoc Sr. Security Researcher Dell SecureWorks. and Transitive Trust

SSL Interception Proxies. Jeff Jarmoc Sr. Security Researcher Dell SecureWorks. and Transitive Trust SSL Interception Proxies Jeff Jarmoc Sr. Security Researcher Dell SecureWorks and Transitive Trust About this talk History & brief overview of SSL/TLS Interception proxies How and Why Risks introduced

More information

Deploying DNSSEC: From End-Customer To Content

Deploying DNSSEC: From End-Customer To Content Deploying DNSSEC: From End-Customer To Content March 28, 2013 www.internetsociety.org Our Panel Moderator: Dan York, Senior Content Strategist, Internet Society Panelists: Sanjeev Gupta, Principal Technical

More information

Evaluation of Certificate Revocation in Microsoft Information Rights Management v1.0

Evaluation of Certificate Revocation in Microsoft Information Rights Management v1.0 Evaluation of Certificate Revocation in Microsoft Information Rights Management v1.0 Hong Zhou hzho021@ec.auckland.ac.nz for CompSci725SC, University of Auckland. 20 October 2006 Abstract Certificate revocation

More information

Asymmetric cryptosystems fundamental problem: authentication of public keys

Asymmetric cryptosystems fundamental problem: authentication of public keys Network security Part 2: protocols and systems (a) Authentication of public keys Università degli Studi di Brescia Dipartimento di Ingegneria dell Informazione 2014/2015 Asymmetric cryptosystems fundamental

More information

GEOSURE PROTECTION PLAN

GEOSURE PROTECTION PLAN GEOSURE PROTECTION PLAN I. SCOPE/INTRODUCTION The GeoSure Protection Plan is designed to provide protection against economic loss resulting from specific types of risks associated with certain SSL Certificates

More information

Chapter 8 Security. IC322 Fall 2014. Computer Networking: A Top Down Approach. 6 th edition Jim Kurose, Keith Ross Addison-Wesley March 2012

Chapter 8 Security. IC322 Fall 2014. Computer Networking: A Top Down Approach. 6 th edition Jim Kurose, Keith Ross Addison-Wesley March 2012 Chapter 8 Security IC322 Fall 2014 Computer Networking: A Top Down Approach 6 th edition Jim Kurose, Keith Ross Addison-Wesley March 2012 All material copyright 1996-2012 J.F Kurose and K.W. Ross, All

More information

SSL BEST PRACTICES OVERVIEW

SSL BEST PRACTICES OVERVIEW SSL BEST PRACTICES OVERVIEW THESE PROBLEMS ARE PERVASIVE 77.9% 5.2% 19.2% 42.3% 77.9% of sites are HTTP 5.2% have an incomplete chain 19.2% support weak/insecure cipher suites 42.3% support SSL 3.0 83.1%

More information

Best Practices for SIP Security

Best Practices for SIP Security Best Practices for SIP Security IMTC SIP Parity Group Version 21 November 9, 2011 Table of Contents 1. Overview... 33 2. Security Profile... 33 3. Authentication & Identity Protection... 33 4. Protecting

More information

Implementing Secure Sockets Layer on iseries

Implementing Secure Sockets Layer on iseries Implementing Secure Sockets Layer on iseries Presented by Barbara Brown Alliance Systems & Programming, Inc. Agenda SSL Concepts Digital Certificate Manager Local Certificate Authority Server Certificates

More information

Overview. SSL Cryptography Overview CHAPTER 1

Overview. SSL Cryptography Overview CHAPTER 1 CHAPTER 1 Secure Sockets Layer (SSL) is an application-layer protocol that provides encryption technology for the Internet. SSL ensures the secure transmission of data between a client and a server through

More information

SEZ SEZ Online Manual Digital Signature Certficate [DSC] V Version 1.2

SEZ SEZ Online Manual Digital Signature Certficate [DSC] V Version 1.2 SEZ SEZ Online Manual Digital Signature Certficate [DSC] V Version 1.2 Table of Contents 1 Introduction...2 2 Procurement of DSC...3 3 Installation of DSC...4 4 Procedure for entering the DSC details of

More information

Securing Service Access with Digital Certificates

Securing Service Access with Digital Certificates Securing Service Access with Digital Certificates Jovana Palibrk, AMRES NA3 T2, Tbilisi, December 2013. Agenda Theory Cryptographic Protocols and Techniques Public Key Infrastructure TERENA Certificate

More information

SBClient SSL. Ehab AbuShmais

SBClient SSL. Ehab AbuShmais SBClient SSL Ehab AbuShmais Agenda SSL Background U2 SSL Support SBClient SSL 2 What Is SSL SSL (Secure Sockets Layer) Provides a secured channel between two communication endpoints Addresses all three

More information

ITL BULLETIN FOR JULY 2012. Preparing for and Responding to Certification Authority Compromise and Fraudulent Certificate Issuance

ITL BULLETIN FOR JULY 2012. Preparing for and Responding to Certification Authority Compromise and Fraudulent Certificate Issuance ITL BULLETIN FOR JULY 2012 Preparing for and Responding to Certification Authority Compromise and Fraudulent Certificate Issuance Paul Turner, Venafi William Polk, Computer Security Division, Information

More information

White Paper. The risks of authenticating with digital certificates exposed

White Paper. The risks of authenticating with digital certificates exposed White Paper The risks of authenticating with digital certificates exposed Table of contents Introduction... 2 What is remote access?... 2 Authentication with client side digital certificates... 2 Asymmetric

More information

Breaking the Myths of Extended Validation SSL Certificates

Breaking the Myths of Extended Validation SSL Certificates BlackHat Briefings, 2009 Breaking the Myths of Extended Validation SSL Certificates Alexander Sotirov phmsecurity.com Mike Zusman intrepidusgroup.com Introduction Chosen-prefix MD5 collisions allowed us

More information

Understanding Digital Certificates & Secure Sockets Layer (SSL): A Fundamental Requirement for Internet Transactions

Understanding Digital Certificates & Secure Sockets Layer (SSL): A Fundamental Requirement for Internet Transactions Understanding Digital Certificates & Secure Sockets Layer (SSL): A Fundamental Requirement for Internet Transactions February 2005 All rights reserved. Page i Entrust is a registered trademark of Entrust,

More information

The basic groups of components are described below. Fig X- 1 shows the relationship between components on a network.

The basic groups of components are described below. Fig X- 1 shows the relationship between components on a network. Elements of Email Email Components There are a number of software components used to produce, send and transfer email. These components can be broken down as clients or servers, although some components

More information

Concept of Electronic Approvals

Concept of Electronic Approvals E-Lock Technologies Contact info@elock.com Table of Contents 1 INTRODUCTION 3 2 WHAT ARE ELECTRONIC APPROVALS? 3 3 HOW DO INDIVIDUALS IDENTIFY THEMSELVES IN THE ELECTRONIC WORLD? 3 4 WHAT IS THE TECHNOLOGY

More information

Part III-a. Universität Klagenfurt - IWAS Multimedia Kommunikation (VK) M. Euchner; Mai 2001. Siemens AG 2001, ICN M NT

Part III-a. Universität Klagenfurt - IWAS Multimedia Kommunikation (VK) M. Euchner; Mai 2001. Siemens AG 2001, ICN M NT Part III-a Contents Part III-a Public-Key Infrastructure (PKI) Definition of a PKI and PKI components PKI Trust Models Digital Certificate, X.509 Certificate Management and Life Cycle Public Key Infrastructure

More information

GT 6.0 GSI C Security: Key Concepts

GT 6.0 GSI C Security: Key Concepts GT 6.0 GSI C Security: Key Concepts GT 6.0 GSI C Security: Key Concepts Overview GSI uses public key cryptography (also known as asymmetric cryptography) as the basis for its functionality. Many of the

More information

Using etoken for SSL Web Authentication. SSL V3.0 Overview

Using etoken for SSL Web Authentication. SSL V3.0 Overview Using etoken for SSL Web Authentication Lesson 12 April 2004 etoken Certification Course SSL V3.0 Overview Secure Sockets Layer protocol, version 3.0 Provides communication privacy over the internet. Prevents

More information

Public Key Infrastructure

Public Key Infrastructure UT DALLAS Erik Jonsson School of Engineering & Computer Science Public Key Infrastructure Murat Kantarcioglu What is PKI How to ensure the authenticity of public keys How can Alice be sure that Bob s purported

More information

SSL Overview for Resellers

SSL Overview for Resellers Web Security Enterprise Security Identity Verification Services Signing Services SSL Overview for Resellers What We ll Cover Understanding SSL SSL Handshake 101 Market Opportunity for SSL Obtaining an

More information

Web Application Entity Session Management using the eid Card Frank Cornelis 03/03/2010. Fedict 2010. All rights reserved

Web Application Entity Session Management using the eid Card Frank Cornelis 03/03/2010. Fedict 2010. All rights reserved Web Application Entity Session Management using the eid Card Frank Cornelis 03/03/2010 Fedict 2010. All rights reserved What is Entity Authentication? Entity authentication is the process whereby one party

More information

Apple Corporate Email Certificates Certificate Policy and Certification Practice Statement. Apple Inc.

Apple Corporate Email Certificates Certificate Policy and Certification Practice Statement. Apple Inc. Apple Inc. Certificate Policy and Certification Practice Statement Version 2.0 Effective Date: April 10, 2015 Table of Contents 1. Introduction... 4 1.1. Trademarks... 4 1.2. Table of acronyms... 4 1.3.

More information

Certificate Management

Certificate Management Certificate Management Palo Alto Networks PAN-OS Administrator s Guide Version 6.0 Contact Information Corporate Headquarters: Palo Alto Networks 4401 Great America Parkway Santa Clara, CA 95054 www.paloaltonetworks.com/company/contact-us

More information

ARPKI: Attack Resilient Public-Key Infrastructure

ARPKI: Attack Resilient Public-Key Infrastructure ARPKI: Attack Resilient Public-Key Infrastructure David Basin, Cas Cremers, Tiffany Hyun-Jin Kim, Adrian Perrig, Ralf Sasse, Pawel Szalachowski ETH Zurich, University of Oxford, CMU 1 PUBLIC KEYS AND CERTIFICATES

More information

Websense Content Gateway HTTPS Configuration

Websense Content Gateway HTTPS Configuration Websense Content Gateway HTTPS Configuration web security data security email security Support Webinars 2010 Websense, Inc. All rights reserved. Webinar Presenter Title: Sr. Tech Support Specialist Cisco

More information

Secure Sockets Layer (SSL) / Transport Layer Security (TLS)

Secure Sockets Layer (SSL) / Transport Layer Security (TLS) Secure Sockets Layer (SSL) / Transport Layer Security (TLS) Brad Karp UCL Computer Science CS GZ03 / M030 19 th November 2014 What Problems Do SSL/TLS Solve? Two parties, client and server, not previously

More information

Securing your Microsoft Internet Information Services (MS IIS) Web Server with a thawte Digital Certificate thawte thawte thawte thawte thawte 10.

Securing your Microsoft Internet Information Services (MS IIS) Web Server with a thawte Digital Certificate thawte thawte thawte thawte thawte 10. Securing your Microsoft Internet Information Services (MS IIS) Web Server with a thawte Digital Certificate A STEP-BY-STEP GUIDE to test, install and use a thawte Digital Certificate on your MS IIS Web

More information

CS 356 Lecture 28 Internet Authentication. Spring 2013

CS 356 Lecture 28 Internet Authentication. Spring 2013 CS 356 Lecture 28 Internet Authentication Spring 2013 Review Chapter 1: Basic Concepts and Terminology Chapter 2: Basic Cryptographic Tools Chapter 3 User Authentication Chapter 4 Access Control Lists

More information

Authenticity of Public Keys

Authenticity of Public Keys SSL/TLS EJ Jung 10/18/10 Authenticity of Public Keys Bob s key? private key Bob public key Problem: How does know that the public key she received is really Bob s public key? Distribution of Public Keys!

More information

Managing CA-Signed Certificates

Managing CA-Signed Certificates Managing CA-Signed Certificates T.Rob Wyatt, IoPT Consulting t.rob@ioptconsulting.com Managing CA Certificates for MQ - Intermediate So you want to enable SSL on your MQ channels using a commercial Certificate

More information

Network Security: Public Key Infrastructure. Key Distribution - Secret Keys. Key Distribution - Secret Keys

Network Security: Public Key Infrastructure. Key Distribution - Secret Keys. Key Distribution - Secret Keys Network Security: Public Key Infrastructure Guevara Noubir Northeastern University noubir@ccs.neu.edu Network Security Slides adapted from Radia Perlman s slides Key Distribution - Secret Keys What if

More information

ALTERNATIVES TO CERTIFICATION AUTHORITIES FOR A SECURE WEB

ALTERNATIVES TO CERTIFICATION AUTHORITIES FOR A SECURE WEB ALTERNATIVES TO CERTIFICATION AUTHORITIES FOR A SECURE WEB Scott Rea DigiCert, Inc. Session ID: SEC-T02 Session Classification: Intermediate BACKGROUND: WHAT IS A CERTIFICATION AUTHORITY? What is a certification

More information

Overview. Certification Authority. PKI Clients. Registration Authority. Public Key Infrastructure. Public Key Infrastructure

Overview. Certification Authority. PKI Clients. Registration Authority. Public Key Infrastructure. Public Key Infrastructure Public Key Infrastructure Overview Dr. Arjan Durresi Louisiana State University Baton Rouge, LA 70810 Durresi@csc.lsu.Edu These slides are available at: http://www.csc.lsu.edu/~durresi/csc4601-07/ Public

More information

TLS and SRTP for Skype Connect. Technical Datasheet

TLS and SRTP for Skype Connect. Technical Datasheet TLS and SRTP for Skype Connect Technical Datasheet Copyright Skype Limited 2011 Introducing TLS and SRTP Protocols help protect enterprise communications Skype Connect now provides Transport Layer Security

More information

HTTPS Inspection with Cisco CWS

HTTPS Inspection with Cisco CWS White Paper HTTPS Inspection with Cisco CWS What is HTTPS? Hyper Text Transfer Protocol Secure (HTTPS) is a secure version of the Hyper Text Transfer Protocol (HTTP). It is a combination of HTTP and a

More information

Understanding Digital Certificates on z/os Vanguard Las Vegas, NV Session AST3 June 26th 2012

Understanding Digital Certificates on z/os Vanguard Las Vegas, NV Session AST3 June 26th 2012 Understanding Digital Certificates on z/os Vanguard Las Vegas, NV Session AST3 June 26th 2012 Wai Choi, CISSP IBM Corporation RACF/PKI Development & Design Poughkeepsie, NY e-mail: wchoi@us.ibm.com 1 Trademarks

More information

Network Security. Abusayeed Saifullah. CS 5600 Computer Networks. These slides are adapted from Kurose and Ross 8-1

Network Security. Abusayeed Saifullah. CS 5600 Computer Networks. These slides are adapted from Kurose and Ross 8-1 Network Security Abusayeed Saifullah CS 5600 Computer Networks These slides are adapted from Kurose and Ross 8-1 Public Key Cryptography symmetric key crypto v requires sender, receiver know shared secret

More information

Client Server Registration Protocol

Client Server Registration Protocol Client Server Registration Protocol The Client-Server protocol involves these following steps: 1. Login 2. Discovery phase User (Alice or Bob) has K s Server (S) has hash[pw A ].The passwords hashes are

More information

Certificates and network security

Certificates and network security Certificates and network security Tuomas Aura CSE-C3400 Information security Aalto University, autumn 2014 Outline X.509 certificates and PKI Network security basics: threats and goals Secure socket layer

More information

Security. Contents. S-72.3240 Wireless Personal, Local, Metropolitan, and Wide Area Networks 1

Security. Contents. S-72.3240 Wireless Personal, Local, Metropolitan, and Wide Area Networks 1 Contents Security requirements Public key cryptography Key agreement/transport schemes Man-in-the-middle attack vulnerability Encryption. digital signature, hash, certification Complete security solutions

More information

Category: Experimental November 2009

Category: Experimental November 2009 Network Working Group S. Farrell Request for Comments: 5697 Trinity College Dublin Category: Experimental November 2009 Abstract Other Certificates Extension Some applications that associate state information

More information

Savitribai Phule Pune University

Savitribai Phule Pune University Savitribai Phule Pune University Centre for Information and Network Security Course: Introduction to Cyber Security / Information Security Module : Pre-requisites in Information and Network Security Chapter

More information

CS5008: Internet Computing

CS5008: Internet Computing CS5008: Internet Computing Lecture 22: Internet Security A. O Riordan, 2009, latest revision 2015 Internet Security When a computer connects to the Internet and begins communicating with others, it is

More information

Lecture slides by Lawrie Brown for Cryptography and Network Security, 5/e, by William Stallings, Chapter 14 Key Management and Distribution.

Lecture slides by Lawrie Brown for Cryptography and Network Security, 5/e, by William Stallings, Chapter 14 Key Management and Distribution. Lecture slides by Lawrie Brown for Cryptography and Network Security, 5/e, by William Stallings, Chapter 14 Key Management and Distribution. 1 Opening quote. 2 The topics of cryptographic key management

More information

How to make a VPN connection to our servers from Windows 8

How to make a VPN connection to our servers from Windows 8 How to make a VPN connection to our servers from Windows 8 Windows 8 is able to make a newer type of VPN connection called a Secure Socket Tunnelling Protocol (SSTP) connection. This works just like a

More information

NIST Test Personal Identity Verification (PIV) Cards

NIST Test Personal Identity Verification (PIV) Cards NISTIR 7870 NIST Test Personal Identity Verification (PIV) Cards David A. Cooper http://dx.doi.org/10.6028/nist.ir.7870 NISTIR 7870 NIST Text Personal Identity Verification (PIV) Cards David A. Cooper

More information

Bugzilla ID: Bugzilla Summary:

Bugzilla ID: Bugzilla Summary: Bugzilla ID: Bugzilla Summary: CAs wishing to have their certificates included in Mozilla products must 1) Comply with the requirements of the Mozilla CA certificate policy (http://www.mozilla.org/projects/security/certs/policy/)

More information

Security vulnerabilities in the Internet and possible solutions

Security vulnerabilities in the Internet and possible solutions Security vulnerabilities in the Internet and possible solutions 1. Introduction The foundation of today's Internet is the TCP/IP protocol suite. Since the time when these specifications were finished in

More information

Introduction to Network Security Key Management and Distribution

Introduction to Network Security Key Management and Distribution Introduction to Network Security Key Management and Distribution Egemen K. Çetinkaya Department of Electrical & Computer Engineering Missouri University of Science and Technology cetinkayae@mst.edu http://web.mst.edu/~cetinkayae/teaching/cpe5420fall2015

More information

Understanding Digital Certificates & Secure Sockets Layer A Fundamental Requirement for Internet Transactions

Understanding Digital Certificates & Secure Sockets Layer A Fundamental Requirement for Internet Transactions A Fundamental Requirement for Internet Transactions May 2007 Copyright 2007 Entrust. All rights reserved. Entrust is a registered trademark of Entrust, Inc. in the United States and certain other countries.

More information

A quick overview of the DANE WG. * DNS-based Authentication of Named Entities

A quick overview of the DANE WG. * DNS-based Authentication of Named Entities A quick overview of the DANE WG * DNS-based Authentication of Named Entities Some background... When you connect to https://www.example.com you use SSL (actually TLS) to secure your connection. Need a

More information

You re FREE Guide SSL. (Secure Sockets Layer) webvisions www.webvisions.com +65 6868 1168 sales@webvisions.com

You re FREE Guide SSL. (Secure Sockets Layer) webvisions www.webvisions.com +65 6868 1168 sales@webvisions.com SSL You re FREE Guide to (Secure Sockets Layer) What is a Digital Certificate? SSL Certificates, also known as public key certificates or Digital Certificates, are essential to secure Internet browsing.

More information

Certification Practice Statement

Certification Practice Statement Certification Practice Statement Revision R1 2013-01-09 1 Copyright Printed: January 9, 2013 This work is the intellectual property of Salzburger Banken Software. Reproduction and distribution require

More information

Understanding Digital Signature And Public Key Infrastructure

Understanding Digital Signature And Public Key Infrastructure Understanding Digital Signature And Public Key Infrastructure Overview The use of networked personnel computers (PC s) in enterprise environments and on the Internet is rapidly approaching the point where

More information

Cisco ISE and Certificates. How to Implement Cisco ISE and Server Side Certificates

Cisco ISE and Certificates. How to Implement Cisco ISE and Server Side Certificates Cisco ISE and Certificates How to Implement Cisco ISE and Server Side Certificates Table of Contents Certificate Usage... 3 So, what is a certificate?... 3 Determine if a Trusted Authority has Signed the

More information

Vidder PrecisionAccess

Vidder PrecisionAccess Vidder PrecisionAccess Security Architecture February 2016 910 E HAMILTON AVENUE. SUITE 410 CAMPBELL, CA 95008 P: 408.418.0440 F: 408.706.5590 WWW.VIDDER.COM Table of Contents I. Overview... 3 II. Components...

More information

Managing the SSL Certificate for the ESRS HTTPS Listener Service Technical Notes P/N 300-011-843 REV A01 January 14, 2011

Managing the SSL Certificate for the ESRS HTTPS Listener Service Technical Notes P/N 300-011-843 REV A01 January 14, 2011 Managing the SSL Certificate for the ESRS HTTPS Listener Service Technical Notes P/N 300-011-843 REV A01 January 14, 2011 This document contains information on these topics: Introduction... 2 Terminology...

More information

How to configure SSL proxying in Zorp 3 F5

How to configure SSL proxying in Zorp 3 F5 How to configure SSL proxying in Zorp 3 F5 June 14, 2013 This tutorial describes how to configure Zorp to proxy SSL traffic Copyright 1996-2013 BalaBit IT Security Ltd. Table of Contents 1. Preface...

More information