Ad hoc broadcast encryption

10 years 3 months ago
Ad hoc broadcast encryption
Numerous applications in ad hoc networks, peer-to-peer networks, and on-the-fly data sharing call for confidential broadcast without relying on a dealer. To cater for such applications, we propose a new primitive referred to as ad hoc broadcast encryption (AHBE), in which each user possesses a public key and, upon seeing the public keys of the users, a sender can securely broadcast to any subset of them, so that only the intended users can decrypt. We implement a concrete AHBE scheme proven secure under the decision Bilinear Diffie-Hellman Exponentiation (BDHE) assumption. The resulting scheme has sub-linear complexity, comparable to up-to-date broadcast systems which have also sub-linear complexity but require a fully trusted dealer. Categories and Subject Descriptors E.3 [Data Encryption]: Public Key Cryptosystems General Terms Security, Algorithm Keywords Broadcast Encryption, Asymmetric Group Key Agreement, Ad Hoc Broadcast
Qianhong Wu, Bo Qin, Lei Zhang, Josep Domingo-Ferr
Added 28 Feb 2011
Updated 28 Feb 2011
Type Journal
Year 2010
Where CCS
Authors Qianhong Wu, Bo Qin, Lei Zhang, Josep Domingo-Ferrer
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