ch21 - Computer Security: Principles and Practice Chapter...

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Computer Security: Principles and Practice First Edition by William Stallings and Lawrie Brown Lecture slides by Lawrie Brown Chapter 21 Chapter 21 Internet Security Internet Security Protocols and Standards Protocols and Standards
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2 Internet Security Protocols and Standards Secure Sockets Layer (SSL) / Transport Layer Security (TLS) IPv4 and IPv6 Security S/MIME (Secure/Multipurpose Internet Mail Extension)
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3 Secure Sockets Layer (SSL) transport layer security service originally developed by Netscape version 3 designed with public input subsequently became Internet standard RFC2246: Transport Layer Security (TLS) use TCP to provide a reliable end-to-end service may be provided in underlying protocol suite or embedded in specific packages
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4 SSL Protocol Stack
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5 SSL Record Protocol Services message integrity using a MAC with shared secret key similar to HMAC but with different padding confidentiality using symmetric encryption with a shared secret key defined by Handshake Protocol AES, IDEA, RC2-40, DES-40, DES, 3DES, Fortezza, RC4-40, RC4-128 message is compressed before encryption
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6 SSL Record Protocol Operation
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7 SSL Change Cipher Spec Protocol one of 3 SSL specific protocols which use the SSL Record protocol a single message causes pending state to become current hence updating the cipher suite in use
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8 SSL Alert Protocol conveys SSL-related alerts to peer entity
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This note was uploaded on 02/05/2011 for the course CS 2105 taught by Professor Ana during the Fall '09 term at National University of Singapore.

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ch21 - Computer Security: Principles and Practice Chapter...

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