Cryptanalysis of an (hierarchical) identity based parallel key-insulated encryption scheme

Authors:
Xu An Wang;Jian Weng;Xiaoyuan Yang;Minqing Zhang
Affiliations:
Key Laboratory of Information and Network Security, Engineering College of Chinese Armed Police Force, Xi'an 710086, China;State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China and Department of Computer Science, Jinan University, Guangzh ...;Key Laboratory of Information and Network Security, Engineering College of Chinese Armed Police Force, Xi'an 710086, China;Key Laboratory of Information and Network Security, Engineering College of Chinese Armed Police Force, Xi'an 710086, China
Venue:
Journal of Systems and Software
Year:
2011

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Abstract

Abstract: Recently, Ren and Gu (2010) proposed an identity-based parallel key-insulated encryption (IBPKIE) scheme, and further extended their IBPKIE scheme to a hierarchical identity-based parallel key-insulated encryption (HIBPKIE) scheme. They claimed that both schemes are secure against adaptive chosen-ciphertext attacks without random oracles. However, in this paper, by giving concrete attacks, we indicate that their schemes are even not secure against chosen-plaintext attacks.