CCA-Secure Unidirectional Proxy Re-Encryption in the Adaptive Corruption Model without Random Oracles

Jian Weng; Minrong Chen; Yanjiang Yang; Robert H.  Deng; Kefei Chen; Feng Bao

Paper 2010/265 Original: eprint.iacr.org/2010/265 ↗

CCA-Secure Unidirectional Proxy Re-Encryption in the Adaptive Corruption Model without Random Oracles

Jian Weng

Minrong Chen

Yanjiang Yang

Robert H. Deng

Kefei Chen

Feng Bao

Abstract

Proxy re-encryption (PRE), introduced by Blaze, Bleumer and Strauss in Eurocrypt'98, allows a semi-trusted proxy to convert a ciphertext originally intended for Alice into an encryption of the same message intended for Bob. PRE has recently drawn great interest, and many interesting PRE schemes have been proposed. However, up to now, it is still an important question to come up with a chosen-ciphertext secure unidirectional PRE in the adaptive corruption model. To address this problem, we propose a new unidirectional PRE scheme, and prove its chosen-ciphertext security in the adaptive corruption model without random oracles. Compared with the best known unidirectional PRE scheme proposed by Libert and Vergnaud in PKC'08, our schemes enjoys the advantages of both higher efficiency and stronger security.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Preprint.
History: 2010-05-11: last updated; 2010-05-11: published
Short URL: https://ia.cr/2010/265
License: https://creativecommons.org/licenses/by/4.0/

BibTeX

@misc{cryptoeprint:2010/265,
      author = {Jian Weng and Minrong Chen and Yanjiang Yang and Robert H.  Deng and Kefei Chen and Feng Bao},
      title = {CCA-Secure Unidirectional Proxy Re-Encryption in the Adaptive Corruption Model without Random Oracles},
      howpublished = {Cryptology {ePrint} Archive, Paper 2010/265},
      year = {2010},
      url = {https://eprint.iacr.org/2010/265}
}