时间：2013-06-17 Monday, 14:10-15:00

地点：Information Building 629

报告题目: Fully, (Almost) Tightly Secure IBE and Dual System Groups

报告摘要

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. Along the way, we introduce a novel notion of dual system groups and a new randomization and parameter-hiding technique for prime-order bilinear groups.

报告人简介

Jie Chen got his Ph.D from Nanyang Technological University in 2013. His research interests include public-key cryptography, pairing-based cryptography and lattice-based cryptography. Several of his papers have been published/accepted by Designs, Codes and Cryptography, ACISP, CT-RSA, Crypto etc.