Cryptology ePrint Archive: Report 2007/161

Collusion-Resistant Group Key Management Using Attribute-Based Encryption

Ling Cheung and Joseph A. Cooley and Roger Khazan and Calvin Newport

Abstract: This paper illustrates the use of ciphertext-policy attribute-based encryption (CP-ABE), a recently proposed primitive, in the setting of group key management. Specifically, we use the CP-ABE scheme of Bethencourt, Sahai and Waters to implement flat table group key management. Unlike past implementations of flat table, our proposal is resistant to collusion attacks. We also provide efficient mechanisms to refresh user secret keys (for perfect forward secrecy) and to delegate managerial duties to subgroup controllers (for scalability). Finally, we discuss performance issues and directions for future research.

Category / Keywords: applications / key management, multicast

Publication Info: Submitted to GOCP'07

Date: received 2 May 2007

Contact author: lcheung at theory csail mit edu

Available format(s): PDF | BibTeX Citation

Version: 20070507:210322 (All versions of this report)

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