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CITI Technical Report 92-1

Third-Party Authentication in the

Institutional File System

Bill Doster
[email protected]

Jim Rees
[email protected]

Institutional File System Project
Center for Information Technology Integration The University of Michigan
519 West William Street
Ann Arbor, MI 48103?4943


The use of intermediate translators in the Institutional File System presents the problem of authenticating the translator to the file server where the client's private key is not known to the translator. We have implemented a modification to the Kerberos authentication exchange that allows our translators to securely acquire the rights necessary for them to access files and other services on behalf of their clients.

February 2, 1992