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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 encryptionchosen plaintext attackadaptive security.
Contact author(s)
kamaleshiitkgp @ gmail com
History
2017-01-31: received
Short URL
https://ia.cr/2017/059
License
Creative Commons Attribution
CC BY
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