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Title:
Fully, (Almost) Tightly Secure IBE from Standard Assumptions
Authors: Jie Chen, 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.
ePrint: https://eprint.iacr.org/2013/803
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