Paper 2016/844

Secure and Efficient Construction of Broadcast Encryption with Dealership

Kamalesh Acharya and Ratna Dutta

Abstract

Broadcast encryption with dealership (BED) has been proposed to achieve more innovative and scalable business models for broadcast services. It has an extensive application future. However, designing secure BED is a challenging task. The only known BED construction sofar is by Gritti et al. We aim to raise the profile of BED primitives which has not received much attention despite of its importance. This paper presents a selectively chosen plaintext attack (CPA) secure BED scheme supporting maximum number of accountability and privacy (hides the group of users from broadcaster). Our scheme is a key encapsulation mechanism and practically more efficient. It reduces the parameter sizes and computation cost compared to Gritti et al. More interestingly, the broadcaster does not need to rely on users to detect the dishonest dealer. We provide concrete security analysis of our design under reasonable assumptions.

Metadata
Available format(s)
PDF
Category
Public-key cryptography
Publication info
Published elsewhere. will appear in the proceeding of ProvSec 2016
Keywords
broadcast encryption with dealershipchosen plaintext attackmaximum number of accountabilityprivacy.
Contact author(s)
kamaleshiitkgp @ gmail com
History
2016-09-06: received
Short URL
https://ia.cr/2016/844
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2016/844,
      author = {Kamalesh Acharya and Ratna Dutta},
      title = {Secure and Efficient Construction of Broadcast Encryption with Dealership},
      howpublished = {Cryptology ePrint Archive, Paper 2016/844},
      year = {2016},
      note = {\url{https://eprint.iacr.org/2016/844}},
      url = {https://eprint.iacr.org/2016/844}
}
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