Cryptology ePrint Archive: Report 2016/698

A Note on One Secure Anti-Collusion Data Sharing Scheme for Dynamic Groups in the Cloud

Zhengjun Cao and Lihua Liu

Abstract: We remark that the scheme [IEEE TPDS, 27(1), 2016, 40-50] is flawed because the group manager cannot complete his computational task in the registration phase. Actually, they have misunderstood the concept of public key which is usually associated with an asymmetric encryption algorithm. Besides, the mechanism that the group manager has to re-encrypt all data stored in the cloud after a member is revoked, is somewhat infeasible because of its inefficiency.

Category / Keywords: cryptographic protocols / Cloud computing, key distribution, data sharing

Date: received 12 Jul 2016

Contact author: liulh at shmtu edu cn

Available format(s): PDF | BibTeX Citation

Note: 3 pages

Version: 20160713:135533 (All versions of this report)

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