Abstract
Proxy signatures allow a proxy signer to sign messages on behalf of an original signer within a given context. They are widely used in distributed systems, grid computing, mobile agent applications, distributed shared object systems, global distribution networks, and mobile communications. Multi-proxy signature is a variation of the proxy signature primitive. In such a scheme, an original signer delegates his signing power to a group of proxy signers, and then only the cooperation of all the proxy signers can generate valid proxy signatures, referred to as multi-proxy signatures, on behalf of the original signer. Recently, a multi-proxy signature scheme is presented in certificateless public key cryptosystem. We show this scheme is insecure.
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Zhang, L. (2012). Cryptanalysis of a Certificateless Multi-Proxy Signature Scheme. In: Bononi, L., Datta, A.K., Devismes, S., Misra, A. (eds) Distributed Computing and Networking. ICDCN 2012. Lecture Notes in Computer Science, vol 7129. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-25959-3_41
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DOI: https://doi.org/10.1007/978-3-642-25959-3_41
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