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Limitations of the Kerberos Authentication System

The Kerberos authentication system, a part of MITÒs Project Athena, has been adopted by other organizations. Despite KerberosÒs many strengths, it has a number of limitations and some weaknesses. Some are due to specifics of the MIT environment; others represent deficiencies in the protocol design. We discuss a number of such problems, and present solutions to some of them. We also demonstrate how special purpose cryptographic hardware may be needed in some cases.

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