T Cryptography and Data Security
|
|
|
- Lynette Hoover
- 10 years ago
- Views:
Transcription
1 T Cryptography and Data Security Lecture 12: Security systems using public keys 11.1 PGP 11.2 SSL/TLS 11.3 IPSEC Stallings: Ch 16,17 1 Pretty Good Privacy encryption program ottom up approach to the distribution of trust Each user acts as his/her own C and signs the public keys of other users User can accept authenticity of a public key based on recommendation by a third trusted user RS public key encryption used for distribution of session keys *) Digital signatures produced by RS or DS signature algorithms Hash functions are MD5 and SH-1 Symmetric encryption performed using IDE in CF mode (selfsynchronising stream cipher) Public keys held in Key-ring Revocation of public keys is a problem *) data encryption protocol, where the data is encrypted using symmetric encryption, and the symmetric encryption key is encrypted using public key encryption, is called as hybrid encryption 2 1
2 Secure Sockets Layer /Transport Layer Security SSL (by Netscape) adds security to the TCP level of the Internet Protocol stack Reliable end-to-end service. TLS developed by IETF is basically equivalent to SSL v 3.1 Structure: SSL Handshake Protocol SSL Change Cipher Spec Protocol SSL lert Protocol SSL Record Protocol TCP IP HTTP Hypertext Transfer Protocol (Web client/server interaction) can operate on top of SSL ( 3 SSL Record Protocol pplication data fragment compressed fragment MC added encrypted SSL record header appended 4 2
3 SSL Record Protocol Crypto The MC is similar to HMC (indeed, an early version of HMC) with the difference that OPD and IPD fields are concatenated to the key data (not xored as in HMC). MC is based on MD5 or SH-1 lock Cipher lgorithms available (key size in bits): IDE (128) RC2-40 (40) DES-40 (40) DES (56) 3DES ( ) Fortezza (Skipjack) (80) Stream Cipher lgorithms available (key size) RC4-40 (40) RC4-128 (128) 5 FORTEZZ FORTEZZ is a registered trademark of the U.S. National Security gency (NS) Defense Message System Encrypted voice communications over secure telephones. FORTEZZ cards cryptographic "co-processors" provide authentication (DS), data integrity (SH-1), and confidentiality (KE and Skipjack). FORTEZZ-enabled devices PCMCI-based crypto cards serial port devices, Ethernet cards, and modems. Cellular telephones, pagers, PDs, and other mobile devices. Microsoft supports FORTEZZ in its products. 6 3
4 PCMCI WIKIPEDI: PCMCI (nimetty Personal Computer Memory Card International ssociation tai humoristisemmin PCMCI: People Can't Memorize Computer Industry cronyms standardointielimen mukaan) on tietokoneen laajennuskorttipaikan tyyppi. Nykyisin käytetään nimitystä PC Card. Yleensä tämä liitäntä löytyy kannettavista tietokoneista. Kortti, joka voi sisältää esim. Ethernet-sovittimen, modeemin tai kiintolevyn, on yleensä lennossa vaihdettava, mikäli käyttöjärjestelmä sitä tukee. Liitäntä on verrattavissa pöytäkoneista löytyviin enemmän tilaa vieviin liitäntöihin, kuten pci-väylä. PCMCI -väyliä on kolmenlaisia, type I, type II ja type III. Lähes kaikki laitteet liitetään tyyppi 2 -väylään. Väylät eroavat toisistaan vain koossa. Ne ovat kaikki saman levyisiä ja pituisia, ja eroavat vain paksuudessa. Väylien leveys on mm. ja pituus 85.6 mm. Paksuudet ovat: Type mm. (tähän liitetään esim. kortinlukijat) Type mm. (tähän liitetään esim. ethernetsovittimet) Type mm
5 SSL Handshake Protocol Phase 1: Establishing Security Capabilities Nonces Session ID Cipher Suite 1. Key Exchange method: RS, Fixed, ephemeral, or anonymous Diffie-Hellman, Fortezza 2. Cipher lgorithm: ny of the ones mentioned above; Cipher type: Stream or lock; Exportability: Yes or No; 3. Hash algorithm: MD5 or SH-1; Hash size: 0, 16 (MD5), or 20 (SH-1) 4. Key Material (session key data) and IV size (for CC mode) Compression method Phase 2: Server uthentication and Key Exchange Phase 3: Client uthentication and Key Exchange Phase 4: Finish Explicit verification that the authentication and key exchange was successful 9 IPSec The toolbox for building Virtual Private Networks (VPN) Secure branch office connectivity over Internet Secure Remote ccess over Internet Extranet and Intranet connectivity with partners Enhanced electronic commerce security Efficient protection if IPSec implemented in firewall IPSec is below transport layer and so is transparent to applications IPSec is typically also transparent to end users IPSec can be used to provide secure remote login for individual users. 10 5
6 Network Network SEG SEG NE NE 11 IP Sec New specifications December 2005: RFC 4301 Security rchitecture for the Internet Protocol (obsoletes2401) RFC 4302 IP uthentication Header (obsoletes 2402) RFC 4303 IP Encapsulating Security Payload (ESP) (obsoletes 2406) RFC 4304 Extended Sequence Number (ESN) ddendum to IPsec Domain of Interpretation (DOI) for Internet Security ssociation and Key Management Protocol (ISKMP) RFC 4305 Cryptographic lgorithm Implementation Requirements for Encapsulating Security Payload (ESP) and uthentication Header (H) (obsoletes 2404, 2406) RFC 4306 Internet Key Exchange (IKEv2) Protocol (obsoletes 2407, 2408, 2409) RFC 4307 Cryptographic lgorithms for Use in the Internet Key Exchange Version 2 (IKEv2) RFC 4308 Cryptographic Suites for IPsec RFC 4309 Using dvanced Encryption Standard (ES) CCM Mode with IPsec Encapsulating Security Payload (ESP) 12 6
7 End-to-End Security (ESP in Transport Mode) 1 2 data data data 13 VPN Security (ESP in Tunnel Mode) 1 2 data 1 2 data data 14 7
8 Transport mode: IP HDR TCP HDR PYLOD IP HDR ESP HDR TCP HDR PYLOD padding MC encrypted integrity protected Tunnel mode: IP HDR TCP HDR PYLOD IP HDR ESP HDR IP HDR TCP HDR PYLOD padding MC encrypted integrity protected 15 IKEv2 ased on Diffie-Hellman Key Exchange KEi=g a, KEr=g b SK=g ab Initiator (i) HDR, Si1, KEi, Ni Responder (r) HDR, Sr1, KEr, Nr, [CERTREQ] HDR,SK{IDi,[CERT,][CERTREQ,][IDr,]UTH,Si2,TSi,TSr} HDR, SK{IDr, [CERT,] UTH, Sr2, TSi, TSr} 16 8
9 IKEv2 Secure Legacy uthentication (SL) Initiator (i) HDR, Si1, KEi, Ni Responder (r) HDR, Sr1, KEr, Nr, [CERTREQ] HDR, SK{IDi, [CERTREQ,] [IDr,] Si2, TSi, TSr} HDR, SK{IDr, [CERT,] UTH, EP } Cryptographic binding HDR, SK{EP, [UTH]} HDR, SK{EP, [UTH], Sr2, TSi, TSr } 17 Legacy Protocols and EP IETF PPPEXT working group: RFC 2284 Extensible uthentication Protocol (EP) EP is not an authentication protocol in itself, but a standard way of encapsulating an authentication protocol. Composed of message pairs: EP_Request - EP_Response; final pair: EP_Success/EP_Failure EP types have been standardised ( legacy protocols): RFC2716: PPP EP TLS uthentication Protocol Internet Drafts: EP SIM uthentication EP K uthentication Protected EP Protocol (PEP) EP-SKE authentication and key exchange protocol Microsoft EP CHP Extensions The EP GPRS Protocol (EP-GPRS) 18 9
T-79.159 Cryptography and Data Security
T-79.159 Cryptography and Data Security Lecture 11: Security systems using public keys 11.1 PGP Kaufman et al: Ch 17, 11.2 SSL/TLS 18, 19 11.3 IPSEC Stallings: Ch 16,17 1 Pretty Good Privacy Email encryption
Chapter 7 Transport-Level Security
Cryptography and Network Security Chapter 7 Transport-Level Security Lectured by Nguyễn Đức Thái Outline Web Security Issues Security Socket Layer (SSL) Transport Layer Security (TLS) HTTPS Secure Shell
Network Security Essentials Chapter 5
Network Security Essentials Chapter 5 Fourth Edition by William Stallings Lecture slides by Lawrie Brown Chapter 5 Transport-Level Security Use your mentality Wake up to reality From the song, "I've Got
Communication Systems SSL
Communication Systems SSL Computer Science Organization I. Data and voice communication in IP networks II. Security issues in networking III. Digital telephony networks and voice over IP 2 Network Security
Communication Systems 16 th lecture. Chair of Communication Systems Department of Applied Sciences University of Freiburg 2009
16 th lecture Chair of Communication Systems Department of Applied Sciences University of Freiburg 2009 1 25 Organization Welcome to the New Year! Reminder: Structure of Communication Systems lectures
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
Secure Socket Layer/ Transport Layer Security (SSL/TLS)
Secure Socket Layer/ Transport Layer Security (SSL/TLS) David Sánchez Universitat Pompeu Fabra World Wide Web (www) Client/server services running over the Internet or TCP/IP Intranets nets widely used
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
Transport Layer Security Protocols
SSL/TLS 1 Transport Layer Security Protocols Secure Socket Layer (SSL) Originally designed to by Netscape to secure HTTP Version 2 is being replaced by version 3 Subsequently became Internet Standard known
Other VPNs TLS/SSL, PPTP, L2TP. Advanced Computer Networks SS2005 Jürgen Häuselhofer
Other VPNs TLS/SSL, PPTP, L2TP Advanced Computer Networks SS2005 Jürgen Häuselhofer Overview Introduction to VPNs Why using VPNs What are VPNs VPN technologies... TLS/SSL Layer 2 VPNs (PPTP, L2TP, L2TP/IPSec)
The Secure Sockets Layer (SSL)
Due to the fact that nearly all businesses have websites (as well as government agencies and individuals) a large enthusiasm exists for setting up facilities on the Web for electronic commerce. Of course
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
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
CS 356 Lecture 27 Internet Security Protocols. Spring 2013
CS 356 Lecture 27 Internet Security Protocols Spring 2013 Review Chapter 1: Basic Concepts and Terminology Chapter 2: Basic Cryptographic Tools Chapter 3 User Authentication Chapter 4 Access Control Lists
Security Protocols HTTPS/ DNSSEC TLS. Internet (IPSEC) Network (802.1x) Application (HTTP,DNS) Transport (TCP/UDP) Transport (TCP/UDP) Internet (IP)
Security Protocols Security Protocols Necessary to communicate securely across untrusted network Provide integrity, confidentiality, authenticity of communications Based on previously discussed cryptographic
INF3510 Information Security University of Oslo Spring 2011. Lecture 9 Communication Security. Audun Jøsang
INF3510 Information Security University of Oslo Spring 2011 Lecture 9 Communication Security Audun Jøsang Outline Network security concepts Communication security Perimeter security Protocol architecture
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
Transport Level Security
Transport Level Security Overview Raj Jain Washington University in Saint Louis Saint Louis, MO 63130 [email protected] Audio/Video recordings of this lecture are available at: http://www.cse.wustl.edu/~jain/cse571-14/
How To Understand And Understand The Ssl Protocol (Www.Slapl) And Its Security Features (Protocol)
WEB Security: Secure Socket Layer Cunsheng Ding HKUST, Hong Kong, CHINA C. Ding - COMP581 - L22 1 Outline of this Lecture Brief Information on SSL and TLS Secure Socket Layer (SSL) Transport Layer Security
7 Network Security. 7.1 Introduction 7.2 Improving the Security 7.3 Internet Security Framework. 7.5 Absolute Security?
7 Network Security 7.1 Introduction 7.2 Improving the Security 7.3 Internet Security Framework 7.4 Firewalls 7.5 Absolute Security? 7.1 Introduction Security of Communications data transport e.g. risk
Web Security Considerations
CEN 448 Security and Internet Protocols Chapter 17 Web Security Dr. Mostafa Hassan Dahshan Computer Engineering Department College of Computer and Information Sciences King Saud University [email protected]
3.2: Transport Layer: SSL/TLS Secure Socket Layer (SSL) Transport Layer Security (TLS) Protocol
Chapter 2: Security Techniques Background Chapter 3: Security on Network and Transport Layer Network Layer: IPSec Transport Layer: SSL/TLS Chapter 4: Security on the Application Layer Chapter 5: Security
Authentication applications Kerberos X.509 Authentication services E mail security IP security Web security
UNIT 4 SECURITY PRACTICE Authentication applications Kerberos X.509 Authentication services E mail security IP security Web security Slides Courtesy of William Stallings, Cryptography & Network Security,
WEB Security & SET. Outline. Web Security Considerations. Web Security Considerations. Secure Socket Layer (SSL) and Transport Layer Security (TLS)
Outline WEB Security & SET (Chapter 19 & Stalling Chapter 7) Web Security Considerations Secure Socket Layer (SSL) and Transport Layer Security (TLS) Secure Electronic Transaction (SET) Web Security Considerations
Secure Socket Layer. Carlo U. Nicola, SGI FHNW With extracts from publications of : William Stallings.
Secure Socket Layer Carlo U. Nicola, SGI FHNW With extracts from publications of : William Stallings. Abstraction: Crypto building blocks NS HS13 2 Abstraction: The secure channel 1., run a key-exchange
Outline. INF3510 Information Security. Lecture 10: Communications Security. Communication Security Analogy. Network Security Concepts
Outline INF3510 Information Security Lecture 10: Communications Security Network security concepts Communication security Perimeter security Protocol architecture and security services Example security
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
Lecture 10: Communications Security
INF3510 Information Security Lecture 10: Communications Security Audun Jøsang University of Oslo Spring 2015 Outline Network security concepts Communication security Perimeter security Protocol architecture
Overview SSL/TLS HTTPS SSH. TLS Protocol Architecture TLS Handshake Protocol TLS Record Protocol. SSH Protocol Architecture SSH Transport Protocol
SSL/TLS TLS Protocol Architecture TLS Handshake Protocol TLS Record Protocol HTTPS SSH SSH Protocol Architecture SSH Transport Protocol Overview SSH User Authentication Protocol SSH Connection Protocol
Part III-b. Universität Klagenfurt - IWAS Multimedia Kommunikation (VK) M. Euchner; Mai 2001. Siemens AG 2001, ICN M NT
Part III-b Contents Part III-b Secure Applications and Security Protocols Practical Security Measures Internet Security IPSEC, IKE SSL/TLS Virtual Private Networks Firewall Kerberos SET Security Measures
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
Network Security. Lecture 3
Network Security Lecture 3 Design and Analysis of Communication Networks (DACS) University of Twente The Netherlands Security protocols application transport network datalink physical Contents IPSec overview
Announcement. Final exam: Wed, June 9, 9:30-11:18 Scope: materials after RSA (but you need to know RSA) Open books, open notes. Calculators allowed.
Announcement Final exam: Wed, June 9, 9:30-11:18 Scope: materials after RSA (but you need to know RSA) Open books, open notes. Calculators allowed. 1 We have learned Symmetric encryption: DES, 3DES, AES,
Chapter 17. Transport-Level Security
Chapter 17 Transport-Level Security Web Security Considerations The World Wide Web is fundamentally a client/server application running over the Internet and TCP/IP intranets The following characteristics
Today s Topics SSL/TLS. Certification Authorities VPN. Server Certificates Client Certificates. Trust Registration Authorities
SSL/TLS Today s Topics Server Certificates Client Certificates Certification Authorities Trust Registration Authorities VPN IPSec Client tunnels LAN-to-LAN tunnels Secure Sockets Layer Secure Sockets Layer
Web Security (SSL) Tecniche di Sicurezza dei Sistemi 1
Web Security (SSL) Tecniche di Sicurezza dei Sistemi 1 How the Web Works - HTTP Hypertext transfer protocol (http). Clients request documents (or scripts) through URL. Server response with documents. Documents
Network Security Web Security and SSL/TLS. Angelos Keromytis Columbia University
Network Security Web Security and SSL/TLS Angelos Keromytis Columbia University Web security issues Authentication (basic, digest) Cookies Access control via network address Multiple layers SHTTP SSL (TLS)
Overview of SSL. Outline. CSC/ECE 574 Computer and Network Security. Reminder: What Layer? Protocols. SSL Architecture
OS Appl. CSC/ECE 574 Computer and Network Security Outline I. Overview II. The Record Protocol III. The Handshake and Other Protocols Topic 8.3 /TLS 1 2 Reminder: What Layer? Overview of 3 4 Protocols
Chapter 10. Network Security
Chapter 10 Network Security 10.1. Chapter 10: Outline 10.1 INTRODUCTION 10.2 CONFIDENTIALITY 10.3 OTHER ASPECTS OF SECURITY 10.4 INTERNET SECURITY 10.5 FIREWALLS 10.2 Chapter 10: Objective We introduce
Security Engineering Part III Network Security. Security Protocols (I): SSL/TLS
Security Engineering Part III Network Security Security Protocols (I): SSL/TLS Juan E. Tapiador [email protected] Department of Computer Science, UC3M Security Engineering 4th year BSc in Computer Science,
Lecture 9 - Network Security TDTS41-2006 (ht1)
Lecture 9 - Network Security TDTS41-2006 (ht1) Prof. Dr. Christoph Schuba Linköpings University/IDA [email protected] Reading: Office hours: [Hal05] 10.1-10.2.3; 10.2.5-10.7.1; 10.8.1 9-10am on Oct. 4+5,
How To Understand And Understand The Security Of A Key Infrastructure
Security+ Guide to Network Security Fundamentals, Third Edition Chapter 12 Applying Cryptography Objectives Define digital certificates List the various types of digital certificates and how they are used
Internetwork Security
Internetwork Security Why Network Security Layers? Fundamentals of Encryption Network Security Layer Overview PGP Security on Internet Layer IPSec IPv6-GCAs SSL/TLS Lower Layers 1 Prof. Dr. Thomas Schmidt
HTTPS: Transport-Layer Security (TLS), aka Secure Sockets Layer (SSL)
CSCD27 Computer and Network Security HTTPS: Transport-Layer Security (TLS), aka Secure Sockets Layer (SSL) 11 SSL CSCD27 Computer and Network Security 1 CSCD27F Computer and Network Security 1 TLS (Transport-Layer
Introduction to Computer Security
Introduction to Computer Security Network Security Pavel Laskov Wilhelm Schickard Institute for Computer Science Circuit switching vs. packet switching OSI and TCP/IP layered models TCP/IP encapsulation
Secure Socket Layer. Security Threat Classifications
Secure Socket Layer 1 Security Threat Classifications One way to classify Web security threats in terms of the type of the threat: Passive threats Active threats Another way to classify Web security threats
Security. Friends and Enemies. Overview Plaintext Cryptography functions. Secret Key (DES) Symmetric Key
Friends and Enemies Security Outline Encryption lgorithms Protocols Message Integrity Protocols Key Distribution Firewalls Figure 7.1 goes here ob, lice want to communicate securely Trudy, the intruder
Managing and Securing Computer Networks. Guy Leduc. Chapter 4: Securing TCP. connections. connections. Chapter goals: security in practice:
Managing and Securing Computer Networks Guy Leduc Chapter 4: Securing TCP connections Computer Networking: A Top Down Approach, 6 th edition. Jim Kurose, Keith Ross Addison-Wesley, March 2012. (section
Introduction to Computer Security
Introduction to Computer Security Network Security Pavel Laskov Wilhelm Schickard Institute for Computer Science Circuit switching vs. packet switching OSI and TCP/IP layered models TCP/IP encapsulation
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
Secure Socket Layer (TLS) Carlo U. Nicola, SGI FHNW With extracts from publications of : William Stallings.
Secure Socket Layer (TLS) Carlo U. Nicola, SGI FHNW With extracts from publications of : William Stallings. Crypto building blocks AS HS13 2 Abstraction: The secure channel 1., run a key-exchange protocol
Chapter 32 Internet Security
Chapter 32 Internet Security Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter 32: Outline 32.1 NETWORK-LAYER SECURITY 32.2 TRANSPORT-LAYER SECURITY 32.3
Introduction to Security and PIX Firewall
Introduction to Security and PIX Firewall Agenda Dag 28 Föreläsning LAB PIX Firewall VPN A Virtual Private Network (VPN) is a service offering secure, reliable connectivity over a shared, public network
SECURE SOCKETS LAYER (SSL) SECURE SOCKETS LAYER (SSL) SSL ARCHITECTURE SSL/TLS DIFFERENCES SSL ARCHITECTURE. INFS 766 Internet Security Protocols
INFS 766 Internet Security s Lecture 5 SSL Prof. Ravi Sandhu SECURE SOCKETS LAYER (SSL) layered on top of TCP SSL versions 1.0, 2.0, 3.0, 3.1 Netscape protocol later refitted as IETF standard TLS (Transport
CSC 774 -- Network Security
CSC 774 -- Network Security Topic 6: Transport Layer Security Dr. Peng Ning CSC 774 Network Security 1 Transport Layer Security Protocols Secure Socket Layer (SSL) Originally developed to secure http Version
CSC 474 Information Systems Security
CSC 474 Information Systems Security Topic 4.5 Transport Layer Security CSC 474 Dr. Peng Ning 1 Transport Layer Security Protocols Secure Socket Layer (SSL) Originally developed to secure http Version
Network Security - Secure upper layer protocols - Background. Email Security. Question from last lecture: What s a birthday attack? Dr.
Network Security - Secure upper layer protocols - Dr. John Keeney 3BA33 Question from last lecture: What s a birthday attack? might think a m-bit hash is secure but by Birthday Paradox is not the chance
Internet Security. Internet Security Voice over IP. Introduction. ETSF10 Internet Protocols 2011-11-22. ETSF10 Internet Protocols 2011
Internet Security Voice over IP ETSF10 Internet Protocols 2011 Kaan Bür & Jens Andersson Department of Electrical and Information Technology Internet Security IPSec 32.1 SSL/TLS 32.2 Firewalls 32.4 + Voice
Cryptography and Network Security Sicurezza delle reti e dei sistemi informatici SSL/TSL
Cryptography and Network Security Sicurezza delle reti e dei sistemi informatici SSL/TSL Security architecture and protocol stack Applicat. (SHTTP) SSL/TLS TCP IPSEC IP Secure applications: PGP, SHTTP,
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
Virtual Private Networks
Virtual Private Networks ECE 4886 Internetwork Security Dr. Henry Owen Definition Virtual Private Network VPN! Virtual separation in protocol provides a virtual network using no new hardware! Private communication
Netzwerksicherheit: Anwendungen
Internet-Technologien (CS262) Netzwerksicherheit: Anwendungen 22. Mai 2015 Christian Tschudin & Thomas Meyer Departement Mathematik und Informatik, Universität Basel Chapter 8 Security in Computer Networks
Securing IP Networks with Implementation of IPv6
Securing IP Networks with Implementation of IPv6 R.M.Agarwal DDG(SA), TEC Security Threats in IP Networks Packet sniffing IP Spoofing Connection Hijacking Denial of Service (DoS) Attacks Man in the Middle
Secure Sockets Layer
SSL/TLS provides endpoint authentication and communications privacy over the Internet using cryptography. For web browsing, email, faxing, other data transmission. In typical use, only the server is authenticated
SSL/TLS. What Layer? History. SSL vs. IPsec. SSL Architecture. SSL Architecture. IT443 Network Security Administration Instructor: Bo Sheng
What Layer? /TLS IT443 Network Security Administration Instructor: Bo Sheng Application TCP IPSec IP LAN layer Application TCP IP LAN layer 1 2 History v2 proposed and deployed in Netscape 1.1 (1995) PCT
Secure Socket Layer (SSL) and Trnasport Layer Security (TLS)
Secure Socket Layer (SSL) and Trnasport Layer Security (TLS) CSE598K/CSE545 - Advanced Network Security Prof. McDaniel - Spring 2008 1 SSL/TLS The Secure Socket Layer (SSL) and Transport Layer Security
TLS/SSL in distributed systems. Eugen Babinciuc
TLS/SSL in distributed systems Eugen Babinciuc Contents 1. Introduction to TLS/SSL 2. A quick review of cryptography 3. TLS/SSL in distributed systems 4. Conclusions Introduction to TLS/SSL TLS/SSL History
Network Security Fundamentals
APNIC elearning: Network Security Fundamentals 27 November 2013 04:30 pm Brisbane Time (GMT+10) Introduction Presenter Sheryl Hermoso Training Officer [email protected] Specialties: Network Security IPv6
Computer and Network Security
Computer and Network Security c Copyright 2000 R E Newman Computer & Information Sciences & Engineering University Of Florida Gainesville, Florida 32611-6120 nemo@ciseufledu Network Security Protocols
13 Virtual Private Networks 13.1 Point-to-Point Protocol (PPP) 13.2 Layer 2/3/4 VPNs 13.3 Multi-Protocol Label Switching 13.4 IPsec Transport Mode
13 Virtual Private Networks 13.1 Point-to-Point Protocol (PPP) PPP-based remote access using dial-in PPP encryption control protocol (ECP) PPP extensible authentication protocol (EAP) 13.2 Layer 2/3/4
SECURE SOCKETS LAYER (SSL)
INFS 766 Internet Security Protocols Lecture 5 SSL Prof. Ravi Sandhu SECURE SOCKETS LAYER (SSL) layered on top of TCP SSL versions 1.0, 2.0, 3.0, 3.1 Netscape protocol later refitted as IETF standard TLS
APNIC elearning: Network Security Fundamentals. 20 March 2013 10:30 pm Brisbane Time (GMT+10)
APNIC elearning: Network Security Fundamentals 20 March 2013 10:30 pm Brisbane Time (GMT+10) Introduction Presenter/s Nurul Islam Roman Senior Training Specialist [email protected] Specialties: Routing &
Internet Protocol Security IPSec
Internet Protocol Security IPSec Summer Semester 2011 Integrated Communication Systems Group Ilmenau University of Technology Outline Introduction Authentication Header (AH) Encapsulating Security Payload
Computer Networks. Secure Systems
Computer Networks Secure Systems Summary Common Secure Protocols SSH HTTPS (SSL/TSL) IPSec Wireless Security WPA2 PSK vs EAP Firewalls Discussion Secure Shell (SSH) A protocol to allow secure login to
Security Protocols/Standards
Security Protocols/Standards Security Protocols/Standards Security Protocols/Standards How do we actually communicate securely across a hostile network? Provide integrity, confidentiality, authenticity
Security in IPv6. Basic Security Requirements and Techniques. Confidentiality. Integrity
Basic Security Requirements and Techniques Confidentiality The property that stored or transmitted information cannot be read or altered by an unauthorized party Integrity The property that any alteration
CPS 590.5 Computer Security Lecture 9: Introduction to Network Security. Xiaowei Yang [email protected]
CPS 590.5 Computer Security Lecture 9: Introduction to Network Security Xiaowei Yang [email protected] Previous lectures Worm Fast worm design Today Network security Cryptography building blocks Existing
, ) 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
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!
Chapter 9. IP Secure
Chapter 9 IP Secure 1 Network architecture is usually explained as a stack of different layers. Figure 1 explains the OSI (Open System Interconnect) model stack and IP (Internet Protocol) model stack.
ETSF10 Part 3 Lect 2
ETSF10 Part 3 Lect 2 DHCP, DNS, Security Jens A Andersson Electrical and Information Technology DHCP Dynamic Host Configuration Protocol bootp is predecessor Alternative: manual configuration IP address
Outline. Transport Layer Security (TLS) Security Protocols (bmevihim132)
Security Protocols (bmevihim132) Dr. Levente Buttyán associate professor BME Híradástechnikai Tanszék Lab of Cryptography and System Security (CrySyS) [email protected], [email protected] Outline - architecture
IP Security. Ola Flygt Växjö University, Sweden http://w3.msi.vxu.se/users/ofl/ [email protected] +46 470 70 86 49
IP Security Ola Flygt Växjö University, Sweden http://w3.msi.vxu.se/users/ofl/ [email protected] +46 470 70 86 49 1 Internetworking and Internet Protocols (Appendix 6A) IP Security Overview IP Security
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 roadmap 1 What is network security? 2 Principles of cryptography 3 Message integrity, authentication
SSL... 2 2.1. 3 2.2. 2.2.1. 2.2.2. SSL VPN
1. Introduction... 2 2. Remote Access via SSL... 2 2.1. Configuration of the Astaro Security Gateway... 3 2.2. Configuration of the Remote Client...10 2.2.1. Astaro User Portal: Getting Software and Certificates...10
This Working Paper provides an introduction to the web services security standards.
International Civil Aviation Organization ATNICG WG/8-WP/12 AERONAUTICAL TELECOMMUNICATION NETWORK IMPLEMENTATION COORDINATION GROUP EIGHTH WORKING GROUP MEETING (ATNICG WG/8) Christchurch New Zealand
Case Study for Layer 3 Authentication and Encryption
CHAPTER 2 Case Study for Layer 3 Authentication and Encryption This chapter explains the basic tasks for configuring a multi-service, extranet Virtual Private Network (VPN) between a Cisco Secure VPN Client
IPsec Details 1 / 43. IPsec Details
Header (AH) AH Layout Other AH Fields Mutable Parts of the IP Header What is an SPI? What s an SA? Encapsulating Security Payload (ESP) ESP Layout Padding Using ESP IPsec and Firewalls IPsec and the DNS
VPN VPN requirements Encryption VPN-Types Protocols VPN and Firewalls
Overview VPN VPN requirements Encryption VPN-Types Protocols VPN and Firewalls Computer Net Lab/Praktikum Datenverarbeitung 2 1 VPN - Definition VPNs (Virtual Private Networks) allow secure data transmission
Astaro Security Gateway V8. Remote Access via SSL Configuring ASG and Client
Astaro Security Gateway V8 Remote Access via SSL Configuring ASG and Client 1. Introduction This guide contains complementary information on the Administration Guide and the Online Help. If you are not
Module 8. Network Security. Version 2 CSE IIT, Kharagpur
Module 8 Network Security Lesson 2 Secured Communication Specific Instructional Objectives On completion of this lesson, the student will be able to: State various services needed for secured communication
Overview. Protocols. VPN and Firewalls
Computer Network Lab 2015 Fachgebiet Technische h Informatik, Joachim Zumbrägel Overview VPN VPN requirements Encryption VPN-Types Protocols VPN and Firewalls VPN-Definition VPNs (Virtual Private Networks)
SSL Secure Socket Layer
??? SSL Secure Socket Layer - architecture and services - sessions and connections - SSL Record Protocol - SSL Handshake Protocol - key exchange alternatives - analysis of the SSL Record and Handshake
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
Introduction. Haroula Zouridaki Mohammed Bin Abdullah Waheed Qureshi
Introduction Haroula Zouridaki Mohammed Bin Abdullah Waheed Qureshi Introduction Comparing Secure Hypertext protocol (S-HTTP) to Secure Socket Layer (SSL) Agenda Waheed opens the presentation introduces
CS 4803 Computer and Network Security
Network layers CS 4803 Computer and Network Security Application Transport Network Lower level Alexandra (Sasha) Boldyreva IPsec 1 2 Roughly Application layer: the communicating processes themselves and
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
CSE/EE 461 Lecture 23
CSE/EE 461 Lecture 23 Network Security David Wetherall [email protected] Last Time Naming Application Presentation How do we name hosts etc.? Session Transport Network Domain Name System (DNS) Data
[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
mod_ssl Cryptographic Techniques
mod_ssl Overview Reference The nice thing about standards is that there are so many to choose from. And if you really don t like all the standards you just have to wait another year until the one arises