RKA Security for Identity-Based Signature Scheme

Related-key attack (RKA) is a kind of side-channel attack considered for kinds of cryptographic primitives, such as public key encryption, digital signature, pseudorandom functions etc. However, we note that the RKA-security seems to be not considered for identity-based signature (IBS), which is an...

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Bibliographic Details
Published in:IEEE access 2020, Vol.8, p.17833-17841
Main Authors: Chang, Jinyong, Wang, Huiqun, Wang, Fei, Zhang, Anling, Ji, Yanyan
Format: Article
Language:English
Subjects:
Cryptography
Digital signatures
Encryption
Forgery
Games
identity-based signature
Pseudorandom
Public key
random oracle model
Related-key attack
Security
STEM
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Summary:Related-key attack (RKA) is a kind of side-channel attack considered for kinds of cryptographic primitives, such as public key encryption, digital signature, pseudorandom functions etc. However, we note that the RKA-security seems to be not considered for identity-based signature (IBS), which is an important primitive for identity-based cryptography and proposed by Shamir in 1984. In this paper, for the first time, we introduce the RKA security into IBS schemes and try to define the security model for it. More specifically, we consider the RKA occurs in the users' signing key or the master key of the key-generation center (KGC), which derives two kinds of RKA securities for IBS. Meanwhile, we illustrate that the most efficient Schnorr-like IBS scheme proposed by Galindo and Garcia is RKA-insecure by launching a simple RKA. However, a slight modification of it yields a RKA-secure IBS scheme, for which we give the detailed security proof in the random oracle. Finally, the performance analysis shows that the modified scheme is still extremely efficient but has higher security.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2020.2967904