Restricted CCA-secure bidirectional proxy re-encryption scheme

Author

Guo, Duntao ; Wang, Xu An ; Zhang, Minqing ; Yang, Xiaoyuan

Author_Institution

Key Lab. of Inf. & Network Security, Eng. Coll. of Chinese Armed Police Force, Xi´´an, China

Volume

5

fYear

2010

fDate

9-11 July 2010

Firstpage

678

Lastpage

681

Abstract

Proxy re-encryption allows a proxy to transform a ciphertext computed under Alice´s public key into one that can be opened under Bob´s decryption key. In CANS´08, Deng et al. proposed the first bidirectional IND-PRE-CCA2 secure proxy re-encryption without parings. Later, in PKC´09, Shao et al. proposed the first unidirectional IND-PRE-CCA2 secure proxy re-encryption without parings. But both of these schemes prove their security in the random oracle. They left an open problem of constructing (bidirectional or unidirectional) IND-PRE-CCA2 secure proxy re-encryption scheme in the standard model yet without pairings. In this paper, we try to solve this open problem by proposing two new restricted IND-PRE-CCA2 secure bidirectional proxy re-encryption schemes without pairing nor random oracle.

Keywords

public key cryptography; Alice public key; Bob decryption key; CANS´08; CCA secure bidirectional proxy reencryption scheme; bidirectional IND-PRE-CCA2 secure proxy reencryption; ciphertext; random oracle; Cryptography;

fLanguage

English

Publisher

ieee

Conference_Titel

Computer Science and Information Technology (ICCSIT), 2010 3rd IEEE International Conference on

Conference_Location

Chengdu

Print_ISBN

978-1-4244-5537-9

Type

conf

DOI

10.1109/ICCSIT.2010.5564011

Filename

5564011