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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 encryptionbroadcast encryptionidentity-based broadcast encryptionType-3 pairingsdual-system technique
Contact author(s)
palash @ isical ac in
History
2014-05-28: received
Short URL
https://ia.cr/2014/380
License
Creative Commons Attribution
CC BY
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