Efficient key management for cryptographically enforced access control

Cryptographic enforcement of access control mechanisms relies on encrypting protected data with the keys stored by authorized users. This approach poses the problem of the distribution of secret keys. In this paper, a key management scheme is presented where each user stores a single key and is capa...

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Bibliographic Details
Published in:Computer standards and interfaces 2008-08, Vol.30 (6), p.410-417
Main Authors: Zych, Anna, Petković, Milan, Jonker, Willem
Format: Article
Language:English
Subjects:
Encrypted access control
Hierarchical keys
Key generation
Key management
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Summary:Cryptographic enforcement of access control mechanisms relies on encrypting protected data with the keys stored by authorized users. This approach poses the problem of the distribution of secret keys. In this paper, a key management scheme is presented where each user stores a single key and is capable of efficiently calculating appropriate keys needed to access requested data. The proposed scheme does not require encryption of the same data (key) multiple times with the keys of different users or groups of users. It is designed especially for the purpose of access control. Thanks to that, the space needed for storing public parameters is significantly reduced. Furthermore, the proposed method supports flexible updates when user's access rights change.
ISSN:0920-5489
1872-7018
DOI:10.1016/j.csi.2008.03.009