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Abstract：
To ensure the Internet security, the authors have achieved the realization of the public key infrastructure (PKI) which is used popularly in the world. In the realization of PKI, using authentication service of integrality, it can not only provide the entity authentication, but also protect the integrality of signature. By using a digital envelop, it provides service of the PKI security.
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Source ：
Journal of Beijing University of Technology
ISSN： 0254-0037
Year： 2006
Issue： 6
Volume： 32
Page： 497-500
Affiliated Colleges：
