Cryptology ePrint Archive: Report 2015/098

Adaptive-ID Secure Revocable Identity-Based Encryption from Lattices via Subset Difference Method

Shantian Cheng and Juanyang Zhang

Abstract: In view of the expiration or reveal of user's private credential (or private key) in a realistic scenario, identity-based encryption (IBE) schemes with an efficient key revocation mechanism, or for short, revocable identity-based encryption (RIBE) schemes, become prominently significant. In this paper, we present an RIBE scheme from lattices by combining two Agrawal et al.'s IBE schemes with the subset difference (SD) method. Our scheme is secure against adaptive identity-time attacks in the standard model under the learning with errors (LWE) assumption. In particular, our scheme serves as one solution to the challenge posed by Chen et al.(ACISP '12).

Category / Keywords: public-key cryptography / Revocable identity-based encryption, Lattice techniques, Subset difference method, Adaptive security, Standard model

Original Publication (with major differences): The 11th International Conference on Information Security Practice and Experience (ISPEC 2015)

Date: received 10 Feb 2015

Contact author: scheng002 at ntu edu sg

Available format(s): PDF | BibTeX Citation

Note: This is the full version of a paper due to appear at the 11th International Conference on Information Security Practice and Experience (ISPEC 2015).

Version: 20150223:214721 (All versions of this report)

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