Certificateless public key cryptography resolves the key escrow problem and public key authentication problem.

无证书公钥密码体制解决了密钥托管问题和公钥认证问题。

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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。

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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。

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