Efficient Adaptively Secure IBBE from Standard Assumptions

Somindu C.  Ramanna; Palash Sarkar

Paper 2014/380

Efficient Adaptively Secure IBBE from Standard Assumptions

Somindu C. Ramanna and Palash Sarkar

Abstract

This paper describes the first construction of efficient identity-based broadcast encryption (IBBE) schemes which can be proved secure against adaptive-identity attacks based on standard assumptions. The constructions are obtained by extending the currently known most efficient identity-based encryption scheme proposed by Jutla and Roy in 2013. Ciphertext size and user storage compare favourably to previously known constructions. The new constructions fill both a practical and a theoretical gap in the literature on efficient IBBE schemes.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Preprint. MINOR revision.
Keywords: identity-based encryption broadcast encryption identity-based broadcast encryption Type-3 pairings dual-system technique
Contact author(s): palash @ isical ac in
History: 2014-05-28: received
Short URL: https://ia.cr/2014/380
License: CC BY

BibTeX

@misc{cryptoeprint:2014/380,
      author = {Somindu C.  Ramanna and Palash Sarkar},
      title = {Efficient Adaptively Secure {IBBE} from Standard Assumptions},
      howpublished = {Cryptology {ePrint} Archive, Paper 2014/380},
      year = {2014},
      url = {https://eprint.iacr.org/2014/380}
}