Adaptively Secure Identity-Based Threshold Broadcast Encryption without Random Oracles

Le You Zhang; Yu Pu Hu; Qing Wu

doi:10.4028/www.scientific.net/AMR.143-144.347

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 143-144Adaptively Secure Identity-Based Threshold...

Adaptively Secure Identity-Based Threshold Broadcast Encryption without Random Oracles

Abstract:

A mobile ad hoc network has the computational and energy constraints, the general threshold cryptography does not suit it. In this paper, we consider a new kind of proper public encryption to the ad hoc networks: threshold broadcast encryption. A new construction of identity-based threshold broadcast encryption is proposed. In the proposed scheme, any user can dynamically join the system as a possible recipient, and the sender can dynamically choose the set of recipients and the threshold value t. Our new scheme achieves constant size private keys and O(n-t)-size ciphertexts. This is the first scheme which achieves short ciphertexts and full security in the standard model. Finally, we also show that it is provable security under n+1-Weak Decision Bilinear Diffie-Hellman Exponent (n+1-wDBDHE) assumption.

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Periodical:

Advanced Materials Research (Volumes 143-144)

Pages:

347-352

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.143-144.347

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Online since:

October 2010

Authors:

Le You Zhang, Yu Pu Hu, Qing Wu

Keywords:

Ad Hoc Network, Adaptive Security, Identity-Based Encryption, Provable Security, Threshold Broadcast Encryption, Without Random Oracles

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