Cryptanalysis of an identity based broadcast encryption scheme without random oracles

被引：10

作者：

Wang, Xu An ^{[2
]}

Weng, Jian ^{[1
,3
,4
]}

Yang, Xiaoyuan ^{[2
]}

Yang, Yanjiang ^{[5
]}

机构：

[1] Jinan Univ, Dept Comp Sci, Guangzhou 510632, Guangdong, Peoples R China

[2] Engn Coll Chinese Armed Police Force, Key Lab Informat & Network Secur, Xian 710086, Peoples R China

[3] Beijing Univ Posts & Telecommun, State Key Lab Networking & Switching Technol, Beijing 100876, Peoples R China

[4] Chinese Acad Sci, Inst Software, State Key Lab Informat Secur, Beijing 100080, Peoples R China

[5] Inst Infocomm Res I2R, Singapore 119613, Singapore

来源：

INFORMATION PROCESSING LETTERS | 2011年 / 111卷 / 10期

基金：

国家高技术研究发展计划(863计划); 美国国家科学基金会;

关键词：

Cryptography; Identity based broadcast encryption; Chosen-ciphertext attack; Chosen-plaintext attack; CONSTANT-SIZE CIPHERTEXTS;

D O I：

10.1016/j.ipl.2011.02.007

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Identity based broadcast encryption allows a centralized transmitter to send encrypted messages to a set of identities S, so that only the users with identity in S can decrypt these ciphertexts using their respective private key. Recently [Information Processing Letters 109 (2009)], an identity-based broadcast encryption scheme was proposed (Ren and Gu, 2009) [1], and it was claimed to be fully chosen-ciphertext secure without random oracles. However, by giving a concrete attack, we indicate that this scheme is even not chosen-plaintext secure. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：461 / 464

页数：4

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