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)
Short URL: ia.cr/2015/098
Discussion forum: Show discussion | Start new discussion
[ Cryptology ePrint archive ]