It really depends... firstly, if other encryption standards are supported and secondly on the level of security that is required. For example, Cisco E-Mail Manager is a Web-based, thin client solution, written in Java. Clients log in to CeM, and perform all functions, through their Web browsers. CeM doesn't handle encryption internally. Instead, it uses Secure Socket Layer (SSL) encryption support to all inbound and outbound communication. So, i guess, SSL is the only option if you are working with CeM. Of late though, progress has been made on access security using a number of different encryption-based technologies such as S-HTTP and X.509 Certificate Authorities.
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...