Proceedings ArticleDOI
A comment on efficient certificateless aggregate signature scheme
Pankaj Kumar,Vishnu Sharma +1 more
- pp 515-519
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TLDR
During security analysis, it is found that proposed certificateless aggregate signature scheme is insecure by some concrete attacks and forged by universal adversary.Abstract:
Certificateless signature scheme provides the solution of key escrow problem inherit in ID based public key cryptography. Aggregate signature allows aggregating of n signature in one single short signature which is very efficient in ad-hoc networks, PDA, mobile computation and more. A certificateless aggregate signature scheme solves not only the certification problem and key escrow problem but also done aggregation of n user's signatures. Recently, Deng et al proposed a certificateless aggregate signature scheme in “Concurrency and Computation: Practice and Experience” [doi: 10.1002/cpe.3551] in 2015 and claims that it is unforgeable under some concrete attacks but during security analysis we found it is insecure by some concrete attacks. In this paper, we show that proposed scheme is forged by universal adversary.read more
Citations
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Journal Article
Key replacement attack against a generic construction of certificateless signature
TL;DR: This paper shows that the generic construction of digital signature schemes under the framework of certificateless cryptography is insecure against key replacement attack, and proposes a modification of their scheme and shows its security in a new and simplified security model.
Journal ArticleDOI
A short certificateless aggregate signature against coalition attacks.
TL;DR: To overcome CLAS attacks, an improved CLAS scheme is presented and it is proved that it is existentially unforgeable under the computational Diffie-Hellman assumption and can not only resist coalition attacks but also generate a very short aggregate signature.
References
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Book ChapterDOI
Identity-based cryptosystems and signature schemes
TL;DR: In this article, the authors introduce a novel type of cryptographic scheme, which enables any pair of users to communicate securely and to verify each other's signatures without exchanging private or public keys, without keeping key directories, and without using the services of a third party.
Book ChapterDOI
Aggregate and verifiably encrypted signatures from bilinear maps
TL;DR: In this article, Boneh, Lynn, and Shacham introduced the concept of an aggregate signature, presented security models for such signatures, and gave several applications for aggregate signatures.
Journal Article
Certificateless public key cryptography
TL;DR: In this article, the concept of certificateless public key cryptography (CL-PKC) was introduced and made concrete, which does not require certificates to guarantee the authenticity of public keys.
Book ChapterDOI
On the security of certificateless signature schemes from asiacrypt 2003
TL;DR: This paper provides an attack that can successfully forge a certificateless signature in their model and fixes the problem by proposing a new scheme.
Book ChapterDOI
Certificateless signature revisited
TL;DR: This paper revisits the security models of certificateless signatures and proposes two new constructions which are provably secure in the random oracle model and proves secure against Normal Type I and Super Type II Adversary.