In this scheme, the key updating algorithm is used by the original signer, so the security of the proxy signature key is promoted to a higher level.
该方案将密钥更新算法应用在原始签名者计算过程中，更有效增强了代理签名密钥的安全性。
Besides having the basic properties of the proxy signature, the new scheme prevents proxy misuse, original signer's forgery and public key substitution attack.
此外，该方案不仅满足代理签名的基本性质，还避免了代理权滥用、原始签名人伪造和公钥替换攻击。
The paper proposes a folly distributed proxy signature scheme based on elliptic curve cryptography, which makes the distributed generation of the proxy key and the proxy signature more efficient.
文章提出了基于椭圆曲线密码的完全分布式代理签名体制，极大地提高了代理密钥分布式生成和代理签名分布式生成的效率。
It is shown here that S-L-H scheme is insecure against the public key substitution attack and an improved threshold proxy signature scheme is proposed.
这里指出s - L - H方案不能抵抗公钥替换攻击，并给出了一个改进的门限代理签名方案。
This scheme solves all the problems of key escrow and certificate management, and satisfies the security requirements of a proxy ring signature scheme.
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。
Because PKG can compute the private key of any user in system, it can forge a blind signature or a proxy signature of any one.
因为PK G可以计算系统内任何用户的私钥，当然可以伪造任何用户的盲签名和代理签名。
Even if the current secret key of proxy signer has been leaked, the attacker can't forge the proxy signature of the past period time.
即使当前时段的代理签名密钥泄露，攻击者也无法得到以前时段的代理签名。
This paper analyzes the security of a certificateless proxy signature scheme and shows that it is insecure against the public key replacement attack in certificateless cryptosystems.
对无证书代理签名方案进行安全性分析，指出该方案对于公钥替换攻击是不安全的，并给出具体的攻击方法。
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.
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。
Based on the merits of the Certificateless Public Key Cryptography and combine the proxy signature, we give a proxy signature schemes and its' secure is also based on the DLP.
在结合无证书密码体制的优点与代理签名的有关知识时，本文还给出了一种代理签名的无证书数字签名。
The proxy signature allows proxy signers to sign messages on behalf of the original signer without exposing the original signer's private key.
代理签名使得代理者在不暴露原始签名者私钥的情况下以原始签名者的身份对消息进行签名。
The current proxy blind signature are based on the identity or certificate, needing reliable third-party authentication. Public key system without the certificate has to overcome this shortcoming.
当前的代理盲签名都是基于身份或证书的，需要可靠的第三方认证，而无证书公钥系统却克服了这种缺点。
The proxy multi-signature scheme called YBX is not safe. An attacker can forge the key pair of proxy signature without the original private key, and disguise himself as proxy to sign document.
YBX代理多重签名方案是不安全的，攻击者在不知道原始签名者密钥的情况下，能够伪造代理签名密钥，假冒代理签名者对文件进行签名。
Through the cryptanalysis of a threshold proxy signature scheme in literature, the scheme could not resist insider attacks and public-key substitute attacks.
对一种基于双线性对的新型门限代理签名方案进行了密码分析，发现该门限代理签名方案不能抵抗伪造攻击和公钥替换攻击。
Through the cryptanalysis of a new threshold proxy signature scheme based on bilinear pairings, it is found that the scheme cant resist forgery attack and public-key substitute attack.
给出了对一个已有的高效无证书签名方案的替换公钥攻击，表明了在该方案中，攻击者可以通过替换签名者公钥伪造签名；进而针对该攻击提出了改进方案。
Through the cryptanalysis of a new threshold proxy signature scheme based on bilinear pairings, it is found that the scheme cant resist forgery attack and public-key substitute attack.
给出了对一个已有的高效无证书签名方案的替换公钥攻击，表明了在该方案中，攻击者可以通过替换签名者公钥伪造签名；进而针对该攻击提出了改进方案。
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