session_09_vpn__ipsec__and_tls_101908

33 vpn ipsec and tls tls architecture session a tls

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Unformatted text preview: n keys • In any TLS or SSL session, a client and a server are able to negotiate unique enciphering keys even if they have not previously communicated with each other. 32 VPN, IPSec and TLS TCP/IP Stack and Security Related Protocols Application Layer SMTP, Telnet, FTP, Gopher Transport Layer TCP Network Layer Data Layer VPN IP RARP Ethernet, Token-Ring, FDDI, X.25, Wireless, Async, ATM, SNA...Data Layer IPsec S/MIME S-HTTP PGP IPsec (ISAKMP) • SOCKS V5 • TLS/SSL UDP ARP • • • • IKE v2 • IPsec (AH, ESP) • Packet Filtering • Tunneling Protocols • PPP-EAP, IEEE 802.1X, CHAP, PAP, MS-CHAP TLS M. Mogollon – 01/08 - 33 • The TLS and SSL protocols are implemented at the transport layer of the TCP/IP stack. 33 VPN, IPSec and TLS TLS Architecture • Session — A TLS session is an association between a client and a server. Sessions are created by the Handshake Protocol. — Sessions define a set of cryptographic security parameters, which can be shared among multiple connections. — Sessions are used to avoid the negotiation of new security parameters for each connection. • Connection — A connection is a transport (in the OSI layering model definition) that provides a suitable type of service. — For TLS, such connections are peer-to-peer relationships. — A connections is transient. Every connection is associated with one session. VPN IPsec IKE v2 TLS M. Mogollon – 01/08 - 34 • In SSL, a session is first established between a client and a server and, then, a connection is established. 34 VPN, IPSec and TLS Session Parameters • Session identifier — An arbitrary byte sequence chosen by the server to identify an active or resumable session state. • Peer certificate — An X509.v3 certificate of the peer. This element of the state may be null. • Compression method — The algorithm used to compress data prior to encryption. • Cipher spec — Specifies the data symmetric encryption algorithm (such as null, DES, etc.) and a MAC algorith...
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This note was uploaded on 05/26/2010 for the course TECH 6350 taught by Professor Mogollon during the Spring '10 term at University of Arkansas for Medical Sciences.

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