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Trade-Offs in the Cryptographic Enforcement of Information Flow Policies.

  • Speaker: Professor Jason Crampton, Information Security Group at Royal Holloway, University of London.
  • Date: Wednesday, 11 March 2015 from 16:00 to 17:00
  • Location: Room 151, Birkbeck Main Building

There is growing interest in the use of cryptography as a means of enforcing access control policies. For a given access control policy, alternative cryptographic enforcement schemes differ in the number of cryptographic keys that need to be issued, the amount of public information that needs to be generated to support key derivation, and the time required by end users to derive keys. This talk will provide an overview of cryptographic enforcement techniques for information flow policies and focus on some of the trade-offs (with respect to the above parameters) that are possible. The talk will concentrate on the algorithmic, rather than the cryptographic, aspects of the schemes and is intended to be accessible to a general audience.