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The use of web technology within organisational Intranets is increasing. The combination of a standardised interface and the security features provided by TLS have made web technology very attractive. The TLS technology however has some limitations, especially in its lack of access control functionality. This paper focusses on alternatives to provide improved security services to web based applications. The SESAME security architecture is shown to provide all of the TLS security services, with the addition of other services such as the access control service. Also because SESAME uses the connection based GSS-API which is the same paradigm used by TLS, it is shown to be a suitable replacement. Unfortunately because web servers and web browsers do not provide hooks for replacing the TLS security technology, SESAME is not easily used. Two alternatives are therefore considered that overcome this limitation: a new proposal before the IETF of extending TLS to carry attribute certificates and a hybrid solution built by the authors.

Using Sesame to Secure Web Based Applications on an Intranet