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An Access-Control Calculus for Spanning Administrative Domains
Jon Howell, David Kotz
Dartmouth PCS-TR99-361


In our quest to give users uniform access to resources unimpeded by administrative boundaries, we discovered that we needed transitive sharing among users, with the possibility of restricted access along each sharing link. To achieve that goal, we extend Lampson et al.'s calculus for access control to support restricted delegations.

We discuss the advantages of our extension, including the simplification of constructs like ACLs and statement expiration. We also apply our extension to model the Simple Public Key Infrastructure and make suggestions about its future development. Our extended calculus exposes some surprising consequences in such systems that use restricted delegation.

Note: Superceded by TR2000-363.

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   Jon Howell and David Kotz, "An Access-Control Calculus for Spanning Administrative Domains." Dartmouth Computer Science Technical Report PCS-TR99-361, November 1999.

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