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Pairing-based CP-ABE with constant-size ciphertexts and secret keys for cloud environment

Research paper by Vanga Odelu, Ashok Kumar Das, Y. Sreenivasa Rao, Saru Kumari, Muhammad Khurram Khan, Kim-Kwang Raymond Choo

Indexed on: 23 May '16Published on: 21 May '16Published in: Computer Standards & Interfaces



Abstract

Ciphertext-policy attribute-based encryption (CP-ABE) scheme can be deployed in a mobile cloud environment to ensure that data outsourced to the cloud will be protected from unauthorized access. Since mobile devices are generally resource-constrained, CP-ABE schemes designed for a mobile cloud deployment should have constant sizes for secret keys and ciphertexts. However, most existing CP-ABE schemes do not provide both constant size ciphertexts and secret keys. Thus, in this paper, we propose a new pairing-based CP-ABE scheme, which offers both constant size ciphertexts and secret keys (CSCTSK) with an expressive AND gate access structure. We then show that the proposed CP-ABE-CSCTSK scheme is secure against chosen-ciphertext adversary in the selective security model, and present a comparative summary to demonstrate the utility of the scheme.