A Provably Secure Parallel Certificatelesss Ring Signcryption Scheme

摘要：

Ring signcryption is a cryptographic primitive which combines the functions of a ring signature scheme and an encryption scheme. It can provide confidentiality, anonymity and authenticity simultaneously. In this paper, we show security flaw in a previous certificateless ring signcryption scheme (Wang et al.’s scheme) and propose an efficient parallel ring signcryption scheme in certificateless public key setting. Compared with Wang et al.’s scheme, our new scheme needs less pairings and enjoys a shorter ciphertext. Furthermore the parallel execution of the expensive signature and encryption operations in our scheme implies a gain in running efficiency. We also prove that the new scheme is not only indistinguishable against chosen-ciphertext attacks but also existentially unforgeable against chosen-message attacks.

关键词： Signcryption Certificateless ring signcryption Parallel signcryption Bilinear pairing Random oracle

作者: Lijun Zhu Futai Zhang Songqin Miao

作者单位: College of Computer Science and Technology Nanjing Normal University Jiangsu Engineering Research Center on Information Security and Privacy Protection Technology, Nanjing, China

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: 423-427

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）