Abstract
This paper examines a hash based hierarchical access control scheme proposed by Yang and Li. It is shown that the scheme suffers from the ex-member access problem. A new hash based scheme that avoids the ex-member problem is proposed. Our scheme has the following advantages: (i) it uses less private storage per node; (ii) addition or deletion of nodes and users does not require rekeying of all nodes; and (iii) the static version of the scheme carries a proof of security. A hash based scheme recently proposed by Atallah, Frikken and Blanton also has these properties. Compared to their scheme, our scheme requires less public storage space for tree hierarchies.
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Vadnala, P.K., Mathuria, A. (2006). An Efficient Key Assignment Scheme for Access Control in a Hierarchy. In: Bagchi, A., Atluri, V. (eds) Information Systems Security. ICISS 2006. Lecture Notes in Computer Science, vol 4332. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11961635_14
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DOI: https://doi.org/10.1007/11961635_14
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-68962-1
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