Efficient Conditional Proxy Re-Encryption with Chosen-Ciphertext Security

被引：3
|
作者：
Qiu, JunJie [1 ,2 ]
Hwang, Gi-Hyun [3 ]
Lee, HoonJae [4 ]
机构：
[1] Weifang Univ Sci & Technol, Weifang, Peoples R China
[2] Dongseo Univ, Dept Ubiquitous IT, Busan, South Korea
[3] Dongseo Univ, Dept Informat Commun, Busan, South Korea
[4] Dongseo Univ, Div Comp & Engn, Busan, South Korea
来源：
2014 NINTH ASIA JOINT CONFERENCE ON INFORMATION SECURITY (ASIA JCIS) | 2014年
关键词：
proxy re-encryption; conditional proxy reencryption; random oracle; chosen-ciphertext security;
D O I：
10.1109/AsiaJCIS.2014.11
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
In a proxy re-encryption (PRE) scheme a semitrusted proxy can convert a ciphertext under Alice's public key into a ciphertext for Bob. The proxy does not know the secret key of Alice or Bob, and also does not know the plaintext during the conversion. Conditional proxy re-encryption (C-PRE) can implement fine-grained delegation of decryption rights, and thus is more useful in many applications. In this paper, we propose an efficient C-PRE scheme, and prove its chosen-ciphertext security under decisional bilinear Diffie-Hellman (DBDH) assumption in the random oracle model. Our scheme has significant advantages in both computational and communicational than previous schemes.
引用
收藏
页码：104 / 110
页数：7
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