Provably secure certificateless aggregate signature scheme with designated verifier in an improved security model. (1st May 2019)

• Record Type: Journal Article
• Authors: Shen, Limin; Ma, Jianfeng; Miao, Yinbin; Liu, Hai
• Is Part Of: IET information security. Volume 13:Number 3(2019)
• Page Start: 167
• Page End: 173
• Publication Date: 2019-05-01
• Subjects: public key cryptography -- digital signatures; CLAS scheme -- random oracle model -- coalition attacks -- certificateless aggregate signature scheme -- verification cost -- security models -- computational Diffie‐Hellman assumption; Computer security -- Periodicals; Cryptography -- Periodicals; Computer networks -- Security measures -- Periodicals; Database security -- Periodicals; 005.8
• DOI: 10.1049/iet-ifs.2018.5226
• Languages: English
• ISSNs: 1751-8709

Abstract

Abstract : An aggregate signature (AS) scheme combines multiple signatures which is generated by many different users into a single one. This feature is very beneficial for diminishing storage cost, bandwidth and verification cost. Many previous attempts have been made for designing AS schemes, while the former security models have not clearly addressed coalition attacks, and most of the existing AS schemes cannot resist these kinds of attacks. In this study, the authors provide a modified security model of certificateless AS (CLAS) schemes and then give a new CLAS scheme. The security of their present scheme can be rigorously proved based on the computational Diffie–Hellman assumption in the random oracle model. Furthermore, their scheme can resist such coalition attacks, i.e. an AS in their scheme is valid iff all single signatures used to generate the AS are valid.