In this paper concept of key escrow system is introduced, and algorithms about it are analysed and complemented.
本文介绍了密钥托管的概念，分析并补充了几种密钥托管算法。
However, there are some problems in IBE such as identity authentication, private key distribution, key escrow and so on.
同时，基于身份加密的公钥密码系统中也存在着一些问题，如身份认证、私钥分发以及密钥托管等。
Threshold scheme of key escrow based on elliptic curve system, which can avoid cheat, is proposed, and its security is analyzed.
提出了基于椭圆曲线体制的门限密钥托管方案，并对其安全性进行了分析、讨论。
This paper proposed an efficient ID-based signature scheme without trusted party against the problem of key escrow of ID-based signature system.
针对现有的基于身份签名系统的密钥托管问题，提出了一种高效的基于身份的无可信中心签名方案。
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。
The scheme solves the key escrow problem through binding two parts of keys with a same identity. And the efficiency of the scheme is higher than the existing schemes.
方案通过将两部分密钥绑定于同一身份的方法解决了密钥托管问题，且与已知的一些方案相比，新方案提高了计算效率。
The scheme is based on certificateless cryptosystem, so it can overcome the key escrow of ID-based cryptosystem, and avoid the public key management and storage of certificate-based cryptosys…
方案基于无证书的密码体制，克服了基于身份的密码体制的密钥托管问题，避免基于证书密码体制的公钥存储和管理问题。
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.
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.
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。
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