Abstract:
This paper analyzes three identity-based signcryption schemes, attacks the first two schemes using Indistinguishability under Chosen Ciphertext Attack(IND-CPA), attacks the last one using IND-CPA and forgery attacks method and provides improved schemes respectively. Analysis results show that the improved schemes maintain higher efficiency while satisfying confidentiality, unforgeability, nonrepudiation, public verification and forward security.
Key words:
signcryption,
identity-based signcryption,
semantic security,
unforgeability,
public verifiability,
forward security
摘要： 分析3种基于身份的签密方案，使用不可区分性选择明文攻击(IND-CPA)方法对前2种方案进行攻击，使用IND-CPA和伪造攻击方法对第3种方案进行攻击，并分别给出改进方案。分析结果表明，这3种改进方案的运算效率较高，且具有机密性、不可伪造性、不可否认性、公开验证性和前向安全性。
关键词:
签密,
基于身份的签密,
语义安全性,
不可伪造性,
公开验证性,
前向安全性
CLC Number:
ZHOU Cai-Hua, ZHOU Kun, HU Ri-Xin, JIANG Yong-He. Analysis and Improvement of Identity-based Signcryption Schemes[J]. Computer Engineering, 2012, 38(2): 132-134.
周才学, 周顽, 胡日新, 江永和. 基于身份的签密方案分析与改进[J]. 计算机工程, 2012, 38(2): 132-134.