ID-based threshold decryption secure against adaptive chosen-ciphertext attack

被引：9
|
作者：
Long, Yu
Chen, Kefei
Liu, Shengli
机构：
[1] Shanghai Jiao Tong Univ, Dept Comp Sci & Engn, Shanghai 200240, Peoples R China
[2] Natl Lab Modern Commun, Chengdu, Peoples R China
来源：
COMPUTERS & ELECTRICAL ENGINEERING | 2007年 / 33卷 / 03期
基金：
中国国家自然科学基金;
关键词：
identity-based cryptography; bilinear maps; threshold decryption; chosen-ciphertext attack; pairing-based cryptosystem;
D O I：
10.1016/j.compeleceng.2006.11.003
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
This paper proposes an identity-based threshold decryption scheme IB-ThDec and reduces its security to the Bilinear Diffie-Hellman problem. Compared with previous work, this conceals two pairing computations in the ciphertext validity verification procedure. The formal proof of security of this scheme is provided in the random oracle model. Additionally, we show that IB-ThDec can be applied to the threshold key escrow and the mediated cryptosystems. (C) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码：166 / 176
页数：11
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