Cryptology ePrint Archive: Report 2018/915

On the Security of a Certificateless Strong Designated Verifier Signature Scheme

Nasrollah Pakniat

Abstract: Recently, Chen et al. proposed the first non-delegatable certificateless strong designated verifier signature scheme and claimed that their scheme achieves all security requirements. However, in this paper, we disprove their claim and present a concrete attack which shows that their proposed scheme is forgeable. More precisely, we show that there exist adversaries who are able to forge any signer's signature for any designated verifier on any message of his choice.

Category / Keywords: public-key cryptography / Certificateless cryptography; Cryptanalysis; Designated verifier signature; Non-delegatability

Date: received 26 Sep 2018

Contact author: pakniat at irandoc ac ir

Available format(s): PDF | BibTeX Citation

Version: 20180926:123535 (All versions of this report)

Short URL: ia.cr/2018/915


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