		Mastering Intranet and Internet Technology

Encryption Standards

DES

From the USA Department of Defense, the Data Encryption Standard.

A common key encryption standard. Within the USA uses a 56 bit key. Outside the USA, the key is limited to 40 bits.

RSA

Public/Private Key Encryption from:-
Ronald Rivest, Adi Shamir and Leonard Adelman.

SSL

Secure Sockets Layer. Developed by Netscape
RSA and DES Encryption
Presentation Layer (6) protocol
Can support any Application Layer (7) protocol

Simple Key exchange/management for Internet Protocols - SKIP

PCT - Private Communication Technology

From the Internet Draft...

"2. Abstract

This document specifies version 1 of the Private Communication Technology (PCT) protocol, a security protocol that provides privacy over the Internet. Like Secure Sockets Layer (SSL), the PCT protocol is intended to prevent eavesdropping on communications in client/server applications, with servers always being authenticated and clients being authenticated at the server's option. However, this protocol corrects or improves on several weaknesses of SSL."