IEEE Access (Jan 2024)
Comments on “A Conditional Privacy-Preserving Certificateless Aggregate Signature Scheme in the Standard Model for VANETs”
Abstract
In the above paper “A Conditional Privacy-Preserving Certificateless Aggregate Signature Scheme in the Standard Model for VANETs,” a pairing-based certificateless aggregate signature (CLAS) scheme was proposed. However, a malicious-but-passive KGC attack on this scheme was subsequently presented by Shim. In this paper, we show that even if the CLAS scheme is modified to prevent malicious-but-passive KGC attacks by incorporating Shim’s countermeasure, there are still weaknesses that allow an adversary to forge aggregate or individual signatures.
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