Paper 2013/100

Attacks and Comments on Several Recently Proposed Key Management Schemes

Niu Liu, Shaohua Tang, and Lingling Xu


In this paper, we review three problematic key management(KM) schemes recently proposed, including Kayam’s scheme for groups with hierarchy [9], Piao’s group KM scheme [13], Purushothama’s group KM schemes [15]. We point out the problems in each scheme. Kayam’s scheme is not secure to collusion attack. Piao’s group KM scheme is not secure and has a bad primitive. The hard problem it bases is not really hard. Purushothama’s scheme has a redundant design that costs lots of resources and doesn’t give an advantage to the security evel and dynamic efficiency of it. We also briefly analyze the underlying reasons why these problem emerge.

Available format(s)
Cryptographic protocols
Publication info
Published elsewhere. Unknown status
key management schemeshierarchical access controlcollusion attack
Contact author(s)
csshtang @ gmail com
2014-05-21: last of 2 revisions
2013-02-27: received
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      author = {Niu Liu and Shaohua Tang and Lingling Xu},
      title = {Attacks and Comments on Several Recently Proposed Key Management Schemes},
      howpublished = {Cryptology ePrint Archive, Paper 2013/100},
      year = {2013},
      note = {\url{}},
      url = {}
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