Adaptively Secure Recipient Revocable Broadcast Encryption with Constant size Ciphertext

Kamalesh Acharya; Ratna Dutta

Paper 2017/059

Adaptively Secure Recipient Revocable Broadcast Encryption with Constant size Ciphertext

Kamalesh Acharya and Ratna Dutta

Abstract

In this paper, we put forward the first adaptively secure recipient revocable broadcast encryption (RR-BE) scheme in the standard model. The scheme is adaptively secure against chosen plaintext attack (CPA) under the q-weaker Decisional Augmented Bilinear Diffie-Hellman Exponent (q-wDABDHE) assumption. Our scheme compares well with the only existing RR-BE scheme of Susilo et al. which is selectively secure in the random oracle model. More interestingly, achieving adaptive security in the standard model does not blow up the communication cost in our construction. To be more precise, the size of the ciphertext which is broadcasted by the broadcaster is constant.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Preprint. MINOR revision.
Keywords: recipient revocable broadcast encryption chosen plaintext attack adaptive security.
Contact author(s): kamaleshiitkgp @ gmail com
History: 2017-01-31: received
Short URL: https://ia.cr/2017/059
License: CC BY

BibTeX

@misc{cryptoeprint:2017/059,
      author = {Kamalesh Acharya and Ratna Dutta},
      title = {Adaptively Secure Recipient Revocable Broadcast Encryption with Constant size Ciphertext},
      howpublished = {Cryptology {ePrint} Archive, Paper 2017/059},
      year = {2017},
      url = {https://eprint.iacr.org/2017/059}
}