Cryptology ePrint Archive: Report 2012/496

Updating attribute in CP-ABE: A New Approach

Nishant Doshi and Devesh Jinwala

Abstract: In Ciphertext-Policy Attribute Based Encryption (CP-ABE), attributes are attached to the user‟s secret key and access policy is at-tached to the ciphertext. If attributes in the secret key of a user satisfy the policy then only the genuine user can decrypt the ciphertext. How-ever, such scenario also necessitates periodic updating of the secret key with the changing attributes. According to our observations, the existing attempts at doing so are not efficient. In this paper, we propose a newer approach to add, update or delete the value of particular attribute effi-ciently without the knowledge of the other attributes.

Category / Keywords: public-key cryptography / Attribute, Attribute Based Encryption, Dynamic Attributes, Network Security

Date: received 29 Aug 2012

Contact author: doshinikki2004 at gmail com

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Version: 20120903:125539 (All versions of this report)

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