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中文摘要：
为了克服基于身份密码体制的密钥托管问题和基于无证书密码体制的公钥替换问题，研究者提出了基于证书密码体制的概念。针对李志敏等人提出的基于证书的签名方案提出分析，证明其不满足不可伪造性；针对黄茹芬等人提出的基于证书盲签名方案提出分析，结果表明它不能抵抗公钥替换攻击；对何俊杰提出的基于身份的部分盲签名方案提出分析，指出它不能抵抗窜改协商公共信息攻击。
英文摘要：
In order to overcoming key-escrow problem of ID-based cryptosystem and public key replacing problem of certifi- careless cryptosystem, researcher proposed the definition of certificate-based cryptosystem. This paper analyzed the certificatebased signature scheme by Li Zhi-min et al. The result showed that it couldn＇t meet the safe requirement of unforgeability. It analyzed a certificate-based blind signature scheme by Huang Ru-fen et al. The result indicated that it was not security by replacing public key attack. It analyzed an ID-based partially blind signature scheme by He Jun-jie et al. The result indicated that it didn＇t resist the changing agreed information attack.
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