Article: On the security of two multi-use CCA-secure proxy re-encryption schemes Journal: International Journal of Intelligent Information and Database Systems (IJIIDS) 2013 Vol.7 No.5 pp.422 - 440 Abstract: In proxy re-encryption (PRE), a semi-trusted proxy can convert a ciphertext originally intended for Alice into one which can be decrypted by Bob, while the proxy cannot know the corresponding plaintext. PRE can be classified as single-use PRE and multi-use PRE according to the times the ciphertext can be transformed. In multi-use PRE schemes, the ciphertext can be transformed from A to B and to C and so on. In CCS'09 (post session), Wang et al. proposed a multi-use unidirectional CCA-secure proxy re-encryption scheme. Unfortunately, we show their proposal is not CCA-secure in the corresponding security models by giving concrete attacks. In 2010, Ren et al. proposed a hierarchical identity-based proxy re-encryption scheme without random oracles, and claimed their scheme was also multi-use and CCA-secure, we also show their scheme is not secure. Inderscience Publishers - linking academia, business and industry through research

Title: On the security of two multi-use CCA-secure proxy re-encryption schemes

Authors: Jindan Zhang; Xu An Wang; Yi Ding; Xiaoyuan Yang

Addresses: Department of Electronic Information, Xianyang Vocational Technical College, Xianyang, Shaanxi Province, 712000, China ' Key Laboratory of Information and Network Security, Engineering University of Chinese Armed Police Force, Xi'an, Shaanxi Province, 710086, China ' Key Laboratory of Information and Network Security, Engineering University of Chinese Armed Police Force, Xi'an, Shaanxi Province, 710086, China ' Key Laboratory of Information and Network Security, Engineering University of Chinese Armed Police Force, Xi'an, Shaanxi Province, 710086,China

Abstract: In proxy re-encryption (PRE), a semi-trusted proxy can convert a ciphertext originally intended for Alice into one which can be decrypted by Bob, while the proxy cannot know the corresponding plaintext. PRE can be classified as single-use PRE and multi-use PRE according to the times the ciphertext can be transformed. In multi-use PRE schemes, the ciphertext can be transformed from A to B and to C and so on. In CCS'09 (post session), Wang et al. proposed a multi-use unidirectional CCA-secure proxy re-encryption scheme. Unfortunately, we show their proposal is not CCA-secure in the corresponding security models by giving concrete attacks. In 2010, Ren et al. proposed a hierarchical identity-based proxy re-encryption scheme without random oracles, and claimed their scheme was also multi-use and CCA-secure, we also show their scheme is not secure.

Keywords: proxy re-encryption; PRE; CCA security; chosen ciphertext attacks; multi-use re-encryption schemes; CCA-secure re-encryption schemes; cryptography.

DOI: 10.1504/IJIIDS.2013.056390

International Journal of Intelligent Information and Database Systems, 2013 Vol.7 No.5, pp.422 - 440

Received: 16 Jan 2013
Accepted: 27 Apr 2013
Published online: 31 Mar 2014 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article

Title: On the security of two multi-use CCA-secure proxy re-encryption schemes

Keep up-to-date