Cryptology ePrint Archive: Report 2002/056

Hierarchical ID-Based Cryptography

Craig Gentry and Alice Silverberg

Abstract: We present hierarchical identity-based encryption schemes and signature schemes that have total collusion resistance on an arbitrary number of levels and that have chosen ciphertext security in the random oracle model assuming the difficulty of the Bilinear Diffie-Hellman problem.

Category / Keywords: Identity-Based Cryptography

Date: received 7 May 2002, last revised 24 May 2002

Contact author: cgentry at docomolabs-usa com

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Version: 20020524:230112 (All versions of this report)

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