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Pesto flavored security

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2 Author(s)
Dillema, F.W. ; Dept. of Comput. Sci., Univ. of Tromso, Norway ; Stabell-Kulo, T.

We demonstrate that symmetric-key cryptography can be used for both read and write access control. One-time write access can be granted by handing over an encryption key, and our encryption framework allows the revocation of previously granted rights. The number of keys to be managed explicitly grows linearly with the number of access control policies a user defines, making security manageable. The framework is used in the Pesto distributed storage system. In Pesto, policies can be stored the same as other data and the same mechanism can be used to control access to them. Delegation of authority over policies concerning different tasks can then be performed. Separating the different tasks of the system, allows for different tasks to be assigned to different sets of nodes. Nodes need then only be trusted with respect to the specific task(s) they have been assigned with.

Published in:

Reliable Distributed Systems, 2003. Proceedings. 22nd International Symposium on

Date of Conference:

6-18 Oct. 2003

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