鉴于这种情况，本文设计并实现了一个基于PKI的软件版权保护系统。

In view of this situation, the thesis design and implement a Software Copyright Protection system base on PKI.

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由于PK I体系对于身份识别有着特殊的优势，而软件版权保护必然要对用户的合法身份进行甄别，因此，将PK I体系与软件版权保护结合起来是可行的。

Because of the predominance of PKI system in identification, and users' legal identity must be discriminated for software protection, it is possible to combine software protection and PKI system.

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Licensing被发放，用以保护开发者和软件版权，同一时间，允许其他开发者自由分发和修改源代码。

Licensing was made to protect the developers and software, and at the same time allow other developers to freely distribute and modify the source code.

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