@inproceedings{9966051d8dc6425d960ca07209074324,
title = "CCA-secure proxy re-encryption without pairings",
abstract = "In a proxy re-encryption scheme, a semi-trusted proxy can transform a ciphertext under Alice's public key into another ciphertext that Bob can decrypt. However, the proxy cannot access the plaintext. Due to its transformation property, proxy re-encryption can be used in many applications, such as encrypted email forwarding. In this paper, by using signature of knowledge and Fijisaki-Okamoto conversion, we propose a proxy re-encryption scheme without pairings, in which the proxy can only transform the ciphertext in one direction. The proposal is secure against chosen ciphertext attack (CCA) and collusion attack in the random oracle model based on Decisional Diffie-Hellman (DDH) assumption over ZN2 and integer factorization assumption, respectively. To the best of our knowledge, it is the first unidirectional PRE scheme with CCA security and collusion-resistance.",
keywords = "CCA security, Collusion-resistance, DDH, Random oracle, Unidirectional PRE",
author = "Jun Shao and Zhenfu Cao",
year = "2009",
doi = "10.1007/978-3-642-00468-1\_20",
language = "英语",
isbn = "3642004679",
series = "Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)",
publisher = "Springer Verlag",
pages = "357--376",
booktitle = "Public Key Cryptography - PKC 2009 - 12th International Conference on Practice and Theory in Public Key Cryptography, Proceedings",
address = "德国",
note = "12th International Conference on Practice and Theory in Public Key Cryptography, PKC 2009 ; Conference date: 18-03-2009 Through 20-03-2009",
}