Improvement of Li et al.'s proxy signature scheme

被引：0
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作者：
Dept. of Electrical and Computer Eng., Kangwon National University, Chuncheon, Korea, Republic of [1 ]
不详 [2 ]
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来源：
WSEAS Trans. Syst. | 2006年 / 1卷 / 305-311期
关键词：
Cryptography - Mathematical models - Mobile telecommunication systems - Probability - Random processes - Security of data;
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摘要：
Li et al. proposed a modification to the Park and Lee's nominative proxy signature scheme for mobile communication such that the original signer enables a proxy signer to nominate the verifier. However, this paper shows that this modification is still vulnerable to the original signer's forgery attack, which is contrary to their claims. Additionally, we propose an enhanced scheme to overcome the fundamental security flaw and prove that it is secure in the random oracle model.
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