Cryptology ePrint Archive: Report 2004/109

Concealing Complex Policies with Hidden Credentials

Robert Bradshaw and Jason Holt and Kent Seamons

Abstract: Hidden credentials are useful in protecting sensitive resource requests, resources, policies and credentials. We propose a significant improvement in decryption performance when implementing hidden credentials using the Franklin/Boneh IBE. We also propose a substantially improved secret splitting scheme for enforcing complex policies, and show how it improves concealment of policies from nonsatisfying recipients.

Category / Keywords: public-key cryptography / anonymity

Publication Info: unpublished

Date: received 8 May 2004

Contact author: eprint at lunkwill org

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Version: 20040509:221658 (All versions of this report)

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