Decrease access times through use of caching proxies.
Proxy caches provide a significant challenge to the design of a Web security scheme.
It is important to send any information that will assist a proxy and not compromise security. A proxy may be a trusted or an untrusted agent. In the same transaction a proxy may be trusted by one party but not the other. A proxy may also be used to provide authentication and privacy enhancements. Using a firewall proxy to add or modify security.