On the Security of a RSA-based Certificateless Signature Scheme

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Provided by: International Journal of Network Security
Topic: Security
Format: PDF
The certificatless cryptography has been studied widely since it could eliminate the need of certificates in the public key Infrastructure and solve the inherent key escrow problem in the identity-based cryptography. Recently, a researcher proposed the first RSA-based certificateless signature scheme and demonstrated that their scheme is provably secure in the random oracle model. In this paper, the authors will show that the scheme is insecure against a type I adversary who can replace users' public keys.
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