Cryptanalysis of Efficient Certificateless Proxy Signature Scheme with Provable Security
HUANG Meijuan
DU Hongzhen
Abstract：Recently ,S-H .Seo et al proposed a certificateless signature scheme and used it to construct a certificateless proxy signature with provable security .They demonstrated that their schemes are provable security in the random oracle model under the computational Diffie-Hellman assumption .Unfortunately ,by given concrete attack ,the paper demonstrated that their schemes were not secure against the Type Ⅱ adversary .A Type Ⅱ adversary could forge a legal proxy signature of any message .The paper analyzed the root cause of attack and gave some suggestions for modifications in the end .
Keywords：proxy signaturecertificateless signatureforge attackbilinear map
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1454-1457,1470 )