Proxy blind signatures with extended properties are being thought highly of expandability and widely researched in recent years, because they have both the features of proxy signatures and blind signatures. In traditional proxy blind signature, proxy signer's authority is too big and it will change the original signer's will. The new scheme introduced threshold signature technology, based on secret share thoughts, and constructed threshold proxy blind signature with certificateless cryptography. The scheme implementation process with detailed analysis shows that this scheme is easy to realize, and verifies its security under the random oracle machine. It can be a good application in electronic voting and e-government affairs where user's privacy should be protected.%代理盲签名兼具代理签名和盲签名的优点,同时其具备可扩展性,得到了广泛的关注和研究.针对普通代理盲签名方案中存在代理者权限过大的问题,新方案引入了基于秘密分享思想的门限签名技术,构造了一种新的无证书的门限代理盲签名方案,详细分析了方案的实现过程.分析表明,该方案易于实现,并且能在随机预言下证明其安全性.新方案能够很好地应用在电子投票、电子政务等要求代理签名且需要保护隐私的场合.
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