该方案可用于任意接入结构，每个托管代理者的子密钥能多次使用。
This scheme is used in task input structure, and every sub key of escrow agent could be reused for many times.
该方案没有密钥的托管问题，也不需要管理证书，并且满足代理环签名方案所有的安全性要求。
This scheme solves all the problems of key escrow and certificate management, and satisfies the security requirements of a proxy ring signature scheme.
无证书的代理签名方案在保留基于身份的代理签名不需要证书的优点下，成功地解决了基于身份的代理签名方案中的密钥托管问题。
In order to eliminate the use of certificates in traditional proxy signature and the key-escrow problem in identity-based proxy signature, the notion of certificateless proxy signature was introduced.
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