Cryptology ePrint Archive: Report 2006/442

An attack on the certificateless signature scheme from EUC Workshops 2006

Je Hong Park

Abstract: In this paper, we will show that the certificateless signature scheme recently proposed by Yap, Heng and Goi at EUC Workshops 2006 is insecure against a key replacement attack. Our attack shows that anyone who replaces a signer's public key can forge valid signatures for that signer without knowledge of the signer's private key.

Category / Keywords: public-key cryptography / Signature scheme, Certificateless PKC

Date: received 24 Nov 2006

Contact author: jhpark at etri re kr

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Version: 20061204:101410 (All versions of this report)

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