Firewalls' False Sense of Security

Opinion piece in Computerworld by Jerrold M. Grochow, vice president for information services and technology at MIT, on the limitations of perimeter security and the importance of authorization - closing quote:
Firewalls can go only so far -- at some point, you'll have to develop a secure identity structure that's incorporated into each and every application. And projects such as Kerberos, Shibboleth and Liberty will lead the way.
I would add SAML to that list, and note that SAML 2.0 incorporates functionality from both Liberty ID-FF and Shibboleth.
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