Cryptanalysis of a Certificateless Multi-receiver Signcryption Scheme

摘要：

Certificateless public key cryptography eliminates certificate management in traditional public key infrastructure and solves the key escrow problem in identity-based cryptography. Certificateless signcryption is one of the most important primitives in certificateless public key cryptography which achieves confidentiality and authentication simultaneously. Multi-receiver signcryption signcrypts a message to a large number of receivers. Selvi et al. proposed the first efficient and provably secure certificateless multi-receiver signcryption scheme. Recently, they found the scheme is insecure against the type I adversary and gave an enhanced one. However, we find that their enhanced scheme is still insecure against the type I adversary. In this paper, we present an attack on Selvi et al.’s enhanced scheme. Specifically, we show that a type I adversary can first replace a sender’s public key and generate a signcrypted message on behalf of the sender.

关键词： Certificateless cryptography Certificateless signcryption Certificateless multi-receiver signcryption

作者: Songqin Miao Futai Zhang Lei Zhang

作者单位: School of Computer Science and Technology Nanjing Normal University, Nanjing, China;Jiangsu Engineer Department of Computer Engineering and Mathematics, Universitat Rovira i Virgili Av. Pasos Catalans

会议类型: 国际会议

会议名称: 2010年IEEE多媒体信息网络与安全国际会议

会议地点: 南京

会议语种:英文

页码: 593-597

在线出版日期: 2010-11-01（万方平台首次上网日期，不代表论文的发表时间）