Study Of The Application Of Digital Certificates In The Local Area Network

Along with the computer network's development, the network security changes more and more important. At present in many networks systems all uses firewall technology, invasion examination technology and so on enhances the system's security performance, however these measures only can guard against the external invasion, it is invalid or frail to attack comes from the internal. Specially the very many systems' security is lower in the Intranet, is very easy to be attacted by the internal personnel, and once the system's secret information is leaked out, that often causes the extremely serious losses for the enterprise or the company, therefore it is extremely essential to strengthen the Intranet security measure's search and enhances the system's security performance.Public Key Infrastructure (PKI) is at present the foundation and the core of secure network construction. Through the digital certificate CA ties up user's public key and user's status, this can confirm the user's status in the network; based on the digital certificate, carrying on the encryption and the signature to the information, PKI guaranteed the secret, the authenticity, the integrity and no denying of the information transmissionBased on such background, this article has studied the digital certificate in the Intranet. First this article introduced cryptology knowledge, this is rationale of the digital certificate,then introduced the digital certificate frame, mainly is related standards of PKI, emphasisly explainned CA, the digital certificate standard and the form. Finally designed and has realized a CA software for the Intranet, this software may be used to manufacture each kind of certificate, and can carry on the certificate format conversion, invoke the certificate and so on.