Distributed Public Key Infrastructure via the Blockchain. Sean Pearl April 28, 2015
|
|
|
- Jayson King
- 10 years ago
- Views:
Transcription
1 Distributed Public Key Infrastructure via the Blockchain Sean Pearl April 28, 2015
2 Overview Motivation: Electronic Money Example TTP: PayPal Bitcoin (BTC) Background Structure Other Topics Motivation: Public Key Infrastructure MIT Certcoin Background Structure 2
3 Motivation: Electronic Money Currency held in digital form Motivations Instant payment, deposit, transfer Buyer protection systems Transaction histories Concerns Authorizing transactions Double-spending Centralized and Decentralized Systems 3
4 Motivation: Electronic Money Centralized Systems (Trusted Third Parties) Credit Cards Banking systems Internet Payment services PayPal Convertible Virtual Currencies Digital Wallets Google Wallet, Apple Pay, LoopPay 4
5 Example TTP: PayPal Client Web Interface TLS (SSL 3.0 and up) SSL Certificate (Symantec) CA Signiture RSA on 2048-bit SHA-1 Digest PayPal s Public Key 2048-bit RSA Key Agreement with RSA Symmetric Encryption with AES-256 in Cipher Block Chaining Mode 5
6 Example TTP: PayPal Back-end OpenID user authentication Proprietary balance/transaction model, database Fees on certain transactions Interest earned by PayPal on balances held in user accounts Proprietary bank, credit card interfaces Bank account/cc info stored securely Marketed as an additional layer of security 6
7 Motivation: Electronic Money Decentralized Systems Cryptocurrencies Bitcoin (BTC) At least 677 coin projects based on BTC Litecoin (LTC) Namecoin (NMC) Many defunct Bytecoin (BCN) Ripple (RPL) Map of Cryptocurrency Projects 7
8 Background: Bitcoin (BTC) "Satoshi's" 2008 White Paper bitcoind released as open-source in 2009 Coin as chain of digital signatures Verify past ownership to entry No inherent double-spending protection Distributed transaction ledger Chaining blocks of transactions Decentralized alternative to TTP Proof-of-work establishes legitimacy 8
9 Bitcoin Structure: Transaction Intent to transfer coins List of inputs Sources of coins being spent Number of inputs References to previous outputs Hash of previous transaction Index of output ECDSA Signature, Public Key (Generally) Establishes ownership of output address 9
10 Bitcoin Structure: Transaction List of outputs Destinations for coins being spent Number of outputs Destinations Bitcoin address (Generally) Amount Expressed in Satoshi (1:10-8 BTC) Change Unspent inputs? 10
11 Bitcoin Structure: Transaction Verification Inputs authorized Pay-to-address ECDSA Public Key hashes to address Addresses are intended single-use Digital signature corresponds to PK Pay-to-script Script in referenced output Valid solution in referencing input Multiple signature verfication (Generally) 11
12 Bitcoin Structure: Transaction 12
13 Bitcoin Structure: Transaction 13
14 Bitcoin Structure: Blockchain Public Distributed Cryptographic Ledger Public Fully visible to clients Distributed Decentralized, peer-to-peer transmission Cryptographic Digitally signed transactions, proof-of-work Ledger Transactional database 14
15 Bitcoin Structure: Blockchain Blocks Sequences of signed and verified transactions Published and distributed at ~1:600s Magic number, size Header Hash of previous block (chain) Merkle root hash of block Timestamp Target, nonce (mining) Number, list of transactions 15
16 Bitcoin Structure: Blockchain Chaining Order and timestamp transactions Prevent double-spending Reinforce legitimacy of previous blocks 16
17 Bitcoin Structure: Blockchain 17
18 Bitcoin Structure: Mining Transactions distributed among peers Miners Verify transactions Arrange and solve blocks Proof-of-work HashCash-SHA Block hash starts with target number of 0 bits Nonce manipulation Exponential difficulty control Rolling average of block generation, every 2016 Blocks published at ~1:600s 18
19 Bitcoin Structure: Mining Network Verify and accept new blocks Reward miners New bitcoins Unspent inputs of transactions Synchronization Forking Multiple blocks chained to one predecessor Longer chain wins Largest proven body of work 19
20 Bitcoin Structure: Standards Hashes SHA Blocks, transactions SHA-256/RIPEMD-160 Addresses Digital Signatures Elliptic Curve Digital Signature Algorithm (Proposed) Lamport Signatures Quantum security 20
21 Bitcoin Structure: Standards Merkle Trees Reduce storage Prune spent transactions After some number of blocks Simplified Verification User obtains only block headers Forms longest chain to transaction block Verifies presence of transaction Obtain Merkle branch Basis of network acceptance 21
22 Bitcoin Structure: Pruning 22
23 Bitcoin Structure: Verification 23
24 Bitcoin: Other Topics Wallets Exchanges Mt. Gox Privacy Anonymity Usage Overlay Networks Controversy 24
25 Other Blockchain Applications Cryptocurrencies Bitcoin, Litecoin... Data storage Namecoin (NMC), Emercoin NVS (EMC) Decentralized DNS Storj (SJCX) Decentralized encrypted cloud storage Darkleaks (BTC overlay) Decentralized leaks 25
26 Questions so far? 26
27 Motivation: Public Key Infrastructure Manage and Distribute Public Keys Motivations Digital signature systems Asymmetric key encryption Secure key agreement Concerns Identity spoofing Key revocation 27
28 Motivation: Public Key Infrastructure Certificate Authorities Trusted Third Parties Single point of failure DigiNotar, TrustWave Key recovery services Web of Trust Distributed system High barrier to entry (PGP) Key loss 28
29 Motivation: Public Key Infrastructure Blockchain PKI operations in transactions Built on a DNS/Identity system PKI Operations Register key/domain Update public key Look up public key Revoke lost key Others based on implementation 29
30 Background: Certcoin MIT, 2014; MIT, 2014; Fromknecht, Velicanu, Yakoubov Students of Ron Rivest Built on Namecoin (NMC) Fork of BTC Records vs Transactions Record expiry Record fees not given to miners Merged mining Provides DNS, some PKI 30
31 Certcoin Structure: Registration Low fixed fee Owner posts record to blockchain User ID (domain, ) User-generated public keys, algorithms Online for message authentication Offline for revocation Signatures, algorithms ID signed with Online private key ID signed with Offline private key 31
32 Certcoin Structure: Registration Verification Miners, network ID has not been previously registered If previous registry is valid Valid algorithm choice Verify online digital signature Verify offline digital signature Namecoin record expiration Renewal period 32
33 Certcoin Structure: Update Free Owner posts update record ID Key type Old public key New public key, algorithm ID, new key signed by old private key ID signed by new private key 33
34 Certcoin Structure: Update Verification Miners, network Verify ownership of old public key ID s most recent operation of that type Chains back to registration Verify signature using old public key Verify signature using new public key 34
35 Certcoin Structure: Revocation Owner posts revocation record ID Offline public key Old online public key New online public key, algorithm ID, new online key signed by offline private key ID signed by new online private key 35
36 Certcoin Structure: Revocation Verification Miners, network Verify ownership of old online public key Verify ownership of offline public key Verify signature using offline public key Verify signature using new online public key Does not cover loss of offline private key Proposed solution: Shamir secret sharing Perhaps in version 1 36
37 Certcoin Structure: Lookup Traverse the blockchain Verify ID registration Initialize public key of relevant type For each operation by ID, type Verify key == old key Verify old signature Verify new signature Set public key to new key 37
38 Certcoin Structure: Lookup Confirm owner has private key Before communicating Zero-knowledge proof Algorithm-dependent External to Certcoin 38
39 Example: PayPal Using Certcoin instead of CA Lookup PayPal by traversing blockchain Verifiable chain of ownership Proof of work establishing legitimacy PayPal s online public key 2048-bit RSA Key Agreement with RSA Symmetric Encryption with AES-256 in Cipher Block Chaining Mode 39
40 Questions? 40
41 References 1. C. Fromknecht, D. Velicanu and S. Yakoubov, CertCoin: A NameCoin Based Decentralized Authentication System, May 12, C. Fromknecht, D. Velicanu and S. Yakoubov, A Decentralized Public Key Infrastructure with Identity Retention, November 11, EmerCoin, Using EmerCoin NVS to deploy and manage Public Key Infrastructure (PKI). 4. J. Benaloh and M. de Mare, One-way accumulators: a decentralized alternative to digital signatures, Advances in Cryptology-Eurocrypt '93, LNCS, vol. 765, Springer-Verlag, 1993, pp N. Fazio and A. Nicolos, Cryptographic Accumulators: Definitions, Constructions and Applications. 41
Orwell. From Bitcoin to secure Domain Name System
Orwell. From Bitcoin to secure Domain Name System Michał Jabczyński, Michał Szychowiak Poznań University of Technology Piotrowo 2, 60-965 Poznań, Poland {Michal.Jabczynski, Michal.Szychowiak}@put.poznan.pl
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
Bitcoin: Concepts, Practice, and Research Directions
Bitcoin: Concepts, Practice, and Research Directions Ittay Eyal, Emin Gün Sirer Computer Science, Cornell University DISC Bitcoin Tutorial, October 2014 Barter Gold Fiat 2 Barter Gold Fiat Bitcoin 2008:
Using the Bitcoin Blockchain for secure, independently verifiable, electronic votes. Pierre Noizat - July 2014
Using the Bitcoin Blockchain for secure, independently verifiable, electronic votes. Pierre Noizat - July 2014 The problem with proprietary voting systems Existing electronic voting systems all suffer
Chapter 8. Network Security
Chapter 8 Network Security Cryptography Introduction to Cryptography Substitution Ciphers Transposition Ciphers One-Time Pads Two Fundamental Cryptographic Principles Need for Security Some people who
BitIodine: extracting intelligence from the Bitcoin network
BitIodine: extracting intelligence from the Bitcoin network Michele Spagnuolo http://miki.it [email protected] @mikispag Bitcoin BitIodine About Bitcoin Decentralized, global digital currency A global
Key Management Interoperability Protocol (KMIP)
(KMIP) Addressing the Need for Standardization in Enterprise Key Management Version 1.0, May 20, 2009 Copyright 2009 by the Organization for the Advancement of Structured Information Standards (OASIS).
An Analysis of the Bitcoin Electronic Cash System
An Analysis of the Bitcoin Electronic Cash System Danielle Drainville University of Waterloo December 21, 2012 1 Abstract In a world that relies heavily on technology, privacy is sought by many. Privacy,
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%
Release: 1. ICANWK502A Implement secure encryption technologies
Release: 1 ICANWK502A Implement secure encryption technologies ICANWK502A Implement secure encryption technologies Modification History Release Release 1 Comments This Unit first released with ICA11 Information
How To Encrypt Data With Encryption
USING ENCRYPTION TO PROTECT SENSITIVE INFORMATION Commonwealth Office of Technology Security Month Seminars Alternate Title? Boy, am I surprised. The Entrust guy who has mentioned PKI during every Security
Sync Security and Privacy Brief
Introduction Security and privacy are two of the leading issues for users when transferring important files. Keeping data on-premises makes business and IT leaders feel more secure, but comes with technical
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
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
COMP-530 Cryptographic Systems Security *Requires Programming Background. University of Nicosia, Cyprus
COMP-530 Cryptographic Systems Security *Requires Programming Background University of Nicosia, Cyprus Course Code Course Title ECTS Credits COMP-530 Cryptographic Systems 10 Security Department Semester
Lukasz Pater CMMS Administrator and Developer
Lukasz Pater CMMS Administrator and Developer EDMS 1373428 Agenda Introduction Why do we need asymmetric ciphers? One-way functions RSA Cipher Message Integrity Examples Secure Socket Layer Single Sign
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
Communication Security for Applications
Communication Security for Applications Antonio Carzaniga Faculty of Informatics University of Lugano March 10, 2008 c 2008 Antonio Carzaniga 1 Intro to distributed computing: -server computing Transport-layer
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
Namecoin as alternative to the Domain Name System
Namecoin as alternative to the Domain Name System Xander Lammertink Author, UvA System and Network Engineering [email protected] Marco Davids Supervisor, SIDN Labs Abstract: This paper researches
Public Key Infrastructure (PKI)
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. The purpose of Public Key Infrastructure
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
Payment systems. Tuomas Aura CSE-C3400 Information security. Aalto University, autumn 2015
Payment systems Tuomas Aura CSE-C3400 Information security Aalto University, autumn 2015 Outline 1. Card payment 2. (Anonymous digital cash) 3. Bitcoin 2 CARD PAYMENT 3 Bank cards Credit or debit card
Security Policy Revision Date: 23 April 2009
Security Policy Revision Date: 23 April 2009 Remote Desktop Support Version 3.2.1 or later for Windows Version 3.1.2 or later for Linux and Mac 4 ISL Light Security Policy This section describes the procedure
Electronic Payments. EITN40 - Advanced Web Security
Electronic Payments EITN40 - Advanced Web Security 1 Card transactions Card-Present Smart Cards Card-Not-Present SET 3D Secure Untraceable E-Cash Micropayments Payword Electronic Lottery Tickets Peppercoin
2. Elections We define an electronic vote as a chain of digital signatures. Each owner transfers the vote to the candidate or legislation by digitally
Abstract A purely peer to peer version of electronic vote would allow online votes to be sent directly from one party to another without going through a central voting register. Digital signatures provide
OpenADR 2.0 Security. Jim Zuber, CTO QualityLogic, Inc.
OpenADR 2.0 Security Jim Zuber, CTO QualityLogic, Inc. Security Overview Client and server x.509v3 certificates TLS 1.2 with SHA256 ECC or RSA cipher suites TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 TLS_RSA_WITH_AES_128_CBC_SHA256
Chapter 11 Security+ Guide to Network Security Fundamentals, Third Edition Basic Cryptography
Chapter 11 Security+ Guide to Network Security Fundamentals, Third Edition Basic Cryptography What Is Steganography? Steganography Process of hiding the existence of the data within another file Example:
Secure Sockets Layer (SSL ) / Transport Layer Security (TLS) Network Security Products S31213
Secure Sockets Layer (SSL ) / Transport Layer Security (TLS) Network Security Products S31213 UNCLASSIFIED Example http ://www. greatstuf f. com Wants credit card number ^ Look at lock on browser Use https
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
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
CS 758: Cryptography / Network Security
CS 758: Cryptography / Network Security offered in the Fall Semester, 2003, by Doug Stinson my office: DC 3122 my email address: [email protected] my web page: http://cacr.math.uwaterloo.ca/~dstinson/index.html
7! Cryptographic Techniques! A Brief Introduction
7! Cryptographic Techniques! A Brief Introduction 7.1! Introduction to Cryptography! 7.2! Symmetric Encryption! 7.3! Asymmetric (Public-Key) Encryption! 7.4! Digital Signatures! 7.5! Public Key Infrastructures
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
[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
CoinAMI Coin-Application Mediator Interface
Bilkent University Department of Computer Engineering CoinAMI Coin-Application Mediator Interface Supervisor Can Alkan Members Ahmet Kerim Şenol Alper Gündoğdu Halil İbrahim Özercan Muhammed Yusuf Özkaya
Bit Chat: A Peer-to-Peer Instant Messenger
Bit Chat: A Peer-to-Peer Instant Messenger Shreyas Zare [email protected] https://technitium.com December 20, 2015 Abstract. Bit Chat is a peer-to-peer instant messaging concept, allowing one-to-one
Network Security [2] Plain text Encryption algorithm Public and private key pair Cipher text Decryption algorithm. See next slide
![Network Security [2] Plain text Encryption algorithm Public and private key pair Cipher text Decryption algorithm. See next slide](/thumbs/24/4351346.jpg "Network Security [2] Plain text Encryption algorithm Public and private key pair Cipher text Decryption algorithm. See next slide")
Network Security [2] Public Key Encryption Also used in message authentication & key distribution Based on mathematical algorithms, not only on operations over bit patterns (as conventional) => much overhead
IT Networks & Security CERT Luncheon Series: Cryptography
IT Networks & Security CERT Luncheon Series: Cryptography Presented by Addam Schroll, IT Security & Privacy Analyst 1 Outline History Terms & Definitions Symmetric and Asymmetric Algorithms Hashing PKI
Bitcoin: A Peer-to-Peer Electronic Cash System
Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto [email protected] www.bitcoin.org Abstract. A purely peer-to-peer version of electronic cash would allow online payments to be sent directly
The World of Emerging Payment Systems A Brief Introduction
The World of Emerging Payment Systems A Brief Introduction Joseph M. Vincent Director of Regulatory & Legal Affairs Washington State Department of Financial Institutions Presentation to Financial Management
Bitcoin Miner Optimization
Bitcoin Miner Optimization Nicolas T. Courtois - University College London, UK Bitcoin Mining Bottom Line Bitcoin Mining = a high tech race to determine who will own the currency of the 21 century 2 Nicolas
Electronic Contract Signing without Using Trusted Third Party
Electronic Contract Signing without Using Trusted Third Party Zhiguo Wan 1, Robert H. Deng 2 and David Lee 1 Sim Kim Boon Institute for Financial Economics 1, School of Information Science 2, Singapore
An Introduction to Cryptography as Applied to the Smart Grid
An Introduction to Cryptography as Applied to the Smart Grid Jacques Benoit, Cooper Power Systems Western Power Delivery Automation Conference Spokane, Washington March 2011 Agenda > Introduction > Symmetric
WIRELESS PUBLIC KEY INFRASTRUCTURE FOR MOBILE PHONES
WIRELESS PUBLIC KEY INFRASTRUCTURE FOR MOBILE PHONES Balachandra Muniyal 1 Krishna Prakash 2 Shashank Sharma 3 1 Dept. of Information and Communication Technology, Manipal Institute of Technology, Manipal
OFFICE OF THE CONTROLLER OF CERTIFICATION AUTHORITIES TECHNICAL REQUIREMENTS FOR AUDIT OF CERTIFICATION AUTHORITIES
OFFICE OF THE CONTROLLER OF CERTIFICATION AUTHORITIES TECHNICAL REQUIREMENTS FOR AUDIT OF CERTIFICATION AUTHORITIES Table of contents 1.0 SOFTWARE 1 2.0 HARDWARE 2 3.0 TECHNICAL COMPONENTS 2 3.1 KEY MANAGEMENT
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 [email protected] Version.05 9/2012 1 Certificate Use Overview
Ciphire Mail. Abstract
Ciphire Mail Technical Introduction Abstract Ciphire Mail is cryptographic software providing email encryption and digital signatures. The Ciphire Mail client resides on the user's computer between the
Digital Signatures: A Panoramic View. Palash Sarkar
Digital Signatures: A Panoramic View Palash Sarkar Applied Statistics Unit Indian Statistical Institute, Kolkata India [email protected] International Conference on Electrical Engineering, Computing
Real-Time Communication Security: SSL/TLS. Guevara Noubir [email protected] CSU610
Real-Time Communication Security: SSL/TLS Guevara Noubir [email protected] CSU610 1 Some Issues with Real-time Communication Session key establishment Perfect Forward Secrecy Diffie-Hellman based PFS
Network Security. Computer Networking Lecture 08. March 19, 2012. HKU SPACE Community College. HKU SPACE CC CN Lecture 08 1/23
Network Security Computer Networking Lecture 08 HKU SPACE Community College March 19, 2012 HKU SPACE CC CN Lecture 08 1/23 Outline Introduction Cryptography Algorithms Secret Key Algorithm Message Digest
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
Wireless Mobile Internet Security. 2nd Edition
Brochure More information from http://www.researchandmarkets.com/reports/2330593/ Wireless Mobile Internet Security. 2nd Edition Description: The mobile industry for wireless cellular services has grown
Chapter 4. Authentication Applications. COSC 490 Network Security Annie Lu 1
Chapter 4 Authentication Applications COSC 490 Network Security Annie Lu 1 OUTLINE Kerberos X.509 Authentication Service COSC 490 Network Security Annie Lu 2 Authentication Applications authentication
Introduction to Cryptography
Introduction to Cryptography Part 3: real world applications Jean-Sébastien Coron January 2007 Public-key encryption BOB ALICE Insecure M E C C D channel M Alice s public-key Alice s private-key Authentication
Blockstack: A Global Naming and Storage System Secured by Blockchains
Blockstack: A Global Naming and Storage System Secured by Blockchains Muneeb Ali and Jude Nelson, Princeton University and Blockstack Labs; Ryan Shea, Blockstack Labs; Michael J. Freedman, Princeton University
1720 - Forward Secrecy: How to Secure SSL from Attacks by Government Agencies
1720 - Forward Secrecy: How to Secure SSL from Attacks by Government Agencies Dave Corbett Technical Product Manager Implementing Forward Secrecy 1 Agenda Part 1: Introduction Why is Forward Secrecy important?
APNIC elearning: IPSec Basics. Contact: [email protected]. esec03_v1.0
APNIC elearning: IPSec Basics Contact: [email protected] esec03_v1.0 Overview Virtual Private Networks What is IPsec? Benefits of IPsec Tunnel and Transport Mode IPsec Architecture Security Associations
I N F O R M A T I O N S E C U R I T Y
NIST Special Publication 800-78-2 DRAFT Cryptographic Algorithms and Key Sizes for Personal Identity Verification W. Timothy Polk Donna F. Dodson William. E. Burr I N F O R M A T I O N S E C U R I T Y
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
National Security Agency Perspective on Key Management
National Security Agency Perspective on Key Management IEEE Key Management Summit 5 May 2010 Petrina Gillman Information Assurance (IA) Infrastructure Development & Operations Technical Director National
MOMENTUM - A MEMORY-HARD PROOF-OF-WORK VIA FINDING BIRTHDAY COLLISIONS. DANIEL LARIMER [email protected] Invictus Innovations, Inc
MOMENTUM - A MEMORY-HARD PROOF-OF-WORK VIA FINDING BIRTHDAY COLLISIONS DANIEL LARIMER [email protected] Invictus Innovations, Inc ABSTRACT. We introduce the concept of memory-hard proof-of-work
Wildcard and SAN: Understanding Multi-Use SSL Certificates
Wildcard and SAN: Understanding Multi-Use SSL Certificates LEVERAGING MULTI-USE DIGITAL CERTIFICATES TO SIMPLIFY CERTIFICATE MANAGEMENT AND REDUCE COSTS Wildcard and SAN: Understanding Multi-Use SSL Certificates
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 [email protected] http://web.mst.edu/~cetinkayae/teaching/cpe5420fall2015
SPC5-CRYP-LIB. SPC5 Software Cryptography Library. Description. Features. SHA-512 Random engine based on DRBG-AES-128
SPC5 Software Cryptography Library Data brief SHA-512 Random engine based on DRBG-AES-128 RSA signature functions with PKCS#1v1.5 ECC (Elliptic Curve Cryptography): Key generation Scalar multiplication
Filecoin: A Cryptocurrency Operated File Storage Network
Filecoin: A Cryptocurrency Operated File Storage Network 1e96a1b27a6cb85df68d728cf3695b0c46dbd44d filecoin.io July 15, 2014 Abstract Filecoin is a distributed electronic currency similar to Bitcoin. Unlike
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
Network Security Part II: Standards
Network Security Part II: Standards Raj Jain Washington University Saint Louis, MO 63131 [email protected] These slides are available on-line at: http://www.cse.wustl.edu/~jain/cse473-05/ 18-1 Overview
AN IMPLEMENTATION OF HYBRID ENCRYPTION-DECRYPTION (RSA WITH AES AND SHA256) FOR USE IN DATA EXCHANGE BETWEEN CLIENT APPLICATIONS AND WEB SERVICES
HYBRID RSA-AES ENCRYPTION FOR WEB SERVICES AN IMPLEMENTATION OF HYBRID ENCRYPTION-DECRYPTION (RSA WITH AES AND SHA256) FOR USE IN DATA EXCHANGE BETWEEN CLIENT APPLICATIONS AND WEB SERVICES Kalyani Ganesh
Computer Networks 1 (Mạng Máy Tính 1) Lectured by: Dr. Phạm Trần Vũ MEng. Nguyễn CaoĐạt
Computer Networks 1 (Mạng Máy Tính 1) Lectured by: Dr. Phạm Trần Vũ MEng. Nguyễn CaoĐạt 1 Lecture 11: Network Security Reference: Chapter 8 - Computer Networks, Andrew S. Tanenbaum, 4th Edition, Prentice
Web Security. Mahalingam Ramkumar
Web Security Mahalingam Ramkumar Issues Phishing Spreading misinformation Cookies! Authentication Domain name DNS Security Transport layer security Dynamic HTML Java applets, ActiveX, JavaScript Exploiting
, ) I Transport Layer Security
Secure Sockets Layer (SSL, ) I Transport Layer Security _ + (TLS) Network Security Products S31213 UNCLASSIFIED Location of SSL -L Protocols TCP Ethernet IP SSL Header Encrypted SSL data= HTTP " Independent
EXECUTIVE BRIEF. IT and Business Professionals Say Website Attacks are Persistent and Varied. In this Paper
Sponsored by IT and Business Professionals Say Website Attacks are Persistent and Varied EXECUTIVE BRIEF In this Paper Thirty percent of IT and business professionals say their organization was attacked
CRYPTOGRAPHY AS A SERVICE
CRYPTOGRAPHY AS A SERVICE Peter Robinson RSA, The Security Division of EMC Session ID: ADS R01 Session Classification: Advanced Introduction Deploying cryptographic keys to end points such as smart phones,
I N F O R M A T I O N S E C U R I T Y
NIST Special Publication 800-78-3 DRAFT Cryptographic Algorithms and Key Sizes for Personal Identity Verification W. Timothy Polk Donna F. Dodson William E. Burr Hildegard Ferraiolo David Cooper I N F
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:
Authentication Applications
Authentication Applications will consider authentication functions developed to support application-level authentication & digital signatures will consider Kerberos a private-key authentication service
How encryption works to provide confidentiality. How hashing works to provide integrity. How digital signatures work to provide authenticity and
How encryption works to provide confidentiality. How hashing works to provide integrity. How digital signatures work to provide authenticity and non-repudiation. How to obtain a digital certificate. Installing
Lecture 31 SSL. SSL: Secure Socket Layer. History SSL SSL. Security April 13, 2005
Lecture 31 Security April 13, 2005 Secure Sockets Layer (Netscape 1994) A Platform independent, application independent protocol to secure TCP based applications Currently the most popular internet crypto-protocol
Digital Signatures. Meka N.L.Sneha. Indiana State University. [email protected]. October 2015
Digital Signatures Meka N.L.Sneha Indiana State University [email protected] October 2015 1 Introduction Digital Signatures are the most trusted way to get documents signed online. A digital
Wildcard and SAN: Understanding multi-use SSL Certificates
WHITE PAPER: WILDCARD AND SAN: UNDERSTANDING MULTI-USE SSL CERTIFICATES White paper Wildcard and SAN: Understanding multi-use SSL Certificates Leveraging multi-use digital certificates to simplify certificate
10 Secure Electronic Transactions: Overview, Capabilities, and Current Status
10 Secure Electronic Transactions: Overview, Capabilities, and Current Status Gordon Agnew A&F Consulting, and University of Waterloo, Ontario, Canada 10.1 Introduction Until recently, there were two primary
Biometrics, Tokens, & Public Key Certificates
Biometrics, Tokens, & Public Key Certificates The Merging of Technologies TOKENEER Workstations WS CA WS WS Certificate Authority (CA) L. Reinert S. Luther Information Systems Security Organization Biometrics,
Key Management (Distribution and Certification) (1)
Key Management (Distribution and Certification) (1) Remaining problem of the public key approach: How to ensure that the public key received is really the one of the sender? Illustration of the problem
Chapter 8. Cryptography Symmetric-Key Algorithms. Digital Signatures Management of Public Keys Communication Security Authentication Protocols
Network Security Chapter 8 Cryptography Symmetric-Key Algorithms Public-Key Algorithms Digital Signatures Management of Public Keys Communication Security Authentication Protocols Email Security Web Security
CrashPlan Security SECURITY CONTEXT TECHNOLOGY
TECHNICAL SPECIFICATIONS CrashPlan Security CrashPlan is a continuous, multi-destination solution engineered to back up mission-critical data whenever and wherever it is created. Because mobile laptops
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
msigna Getting Started
msigna Getting Started Thank you for deciding to try msigna, the most powerful secure cryptocoin storage solution available. We think you will enjoy using msigna as it is, but it is still a product under
IBM i Version 7.3. Security Digital Certificate Manager IBM
IBM i Version 7.3 Security Digital Certificate Manager IBM IBM i Version 7.3 Security Digital Certificate Manager IBM Note Before using this information and the product it supports, read the information
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
Public Key Encryption and Digital Signature: How do they work?
White Paper Public Key Encryption and Digital Signature: How do they work? Business solutions through information technology Entire contents 2004 by CGI Group Inc. All rights reserved. Reproduction of
Connected from everywhere. Cryptelo completely protects your data. Data transmitted to the server. Data sharing (both files and directory structure)
Cryptelo Drive Cryptelo Drive is a virtual drive, where your most sensitive data can be stored. Protect documents, contracts, business know-how, or photographs - in short, anything that must be kept safe.
Optimized Certificates A New Proposal for Efficient Electronic Document Signature Validation
Optimized Certificates A New Proposal for Efficient Electronic Document Signature Validation Martín Augusto G. Vigil Ricardo Felipe Custódio Joni da Silva Fraga Juliano Romani Fernando Carlos Pereira Federal
Spirent Abacus. SIP over TLS Test 编 号 版 本 修 改 时 间 说 明
Spirent Abacus SIP over TLS Test 编 号 版 本 修 改 时 间 说 明 1 1. TLS Interview (Transport Layer Security Protocol) (1) TLS Feature Introduction: 1. TLS is a successor of Secure Sockets Layer (SSL), a cryptographic
Secure Socket Layer (SSL) and Transport Layer Security (TLS)
Secure Socket Layer (SSL) and Transport Layer Security (TLS) Raj Jain Washington University in Saint Louis Saint Louis, MO 63130 [email protected] Audio/Video recordings of this lecture are available
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