Journal of South China University of Technology(Natural Science) >

2015 , Vol. 43 >Issue 1: 118 - 125

DOI: https://doi.org/10.3969/j.issn.1000-565X.2015.01.019

Computer Science & Technology

Cryptanalysis of an IB-PRE Scheme with Source Hiding Property

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  • 1. School of Computer Science and Engineering ， South China University of Technology ， Guangzhou 510640 ， Guangdong ， China ；2. School of Computer Engineering ， Guangzhou College of South China University of Technology ， Guangzhou 510800 ，Guangdong ， China
郑郁林（1978-），男，博士生，高级工程师，主要从事信息安全研究 .

Received date: 2014-05-04

  Revised date: 2014-07-12

  Online published: 2014-12-01

Supported by

Supported by the National Natural Science Foundation of China （ 61272413 ）

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Abstract

As Emura-IB-PRE ， an identity label-based proxy re-encryption scheme proposed by Emura et al. ， is of source hiding property and chosen ciphertext security in random oracle model ， a chosen ciphertext security method to attack Emura-IB-PRE scheme is proposed ， and Emura-IB-PRE is proved invalid in resisting the chosen ciphertext attack. In order to solve this problem ， an improved scheme named E-SH-IB-PRE is presented and the corresponding security proof is given. The results indicate the presented scheme is secure against chosen ciphertext attack with source hiding property in random oracle model ， and that the principle ， i.e. ， the first level ciphertext can be publicly verified by proxy ， is important for proxy re-encryption schemes.

Key words： proxy re-encryption; encryption algorithm; source hiding property; chosen ciphertext attack

Cite this article

Zheng Yu-lin Cai Yi . Cryptanalysis of an IB-PRE Scheme with Source Hiding Property[J]. Journal of South China University of Technology(Natural Science), 2015 , 43(1) : 118 -125 . DOI: 10.3969/j.issn.1000-565X.2015.01.019

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