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Paper 2013/803

Fully, (Almost) Tightly Secure IBE from Standard Assumptions

Jie Chen and Hoeteck Wee

Abstract

We present the first fully secure Identity-Based Encryption scheme (IBE) from the standard assumptions where the security loss depends only on the security parameter and is independent of the number of secret key queries. This partially answers an open problem posed by Waters (Eurocrypt 2005). Our construction combines Waters' dual system encryption methodology (Crypto 2009) with the Naor-Reingold pseudo-random function (J. ACM, 2004) in a novel way. The security of our scheme relies on the DLIN assumption in prime-order groups.

Metadata
Available format(s)
PDF
Category
Public-key cryptography
Publication info
A major revision of an IACR publication in CRYPTO 2013
DOI
10.1007/978-3-642-40084-1_25
Keywords
Identity-based encryptiontight security proofs
Contact author(s)
s080001 @ e ntu edu sg;hoeteck @ alum mit edu
History
2013-12-01: received
Short URL
https://ia.cr/2013/803
License
Creative Commons Attribution
CC BY
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