A method for realizing a network access authentication
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A method for realizing a network access authentication, wherein a network access authentication device prestores a system integrity value calculated by the waiting to access the computer itself a waiting to access computer, and a correspondence between each of access waiting computer and the system integrity value, the method comprising the steps of: a) the waiting to access computer determines its current system integrity value and sends an authentication request, the information including the current system integrity value, comprises, at the network access authentication device; b) assesses the network access authentication device, whether the current system integrity value of the waiting to access the computer in the received authentication request and the stored system integrity value of the waiting to access the computer are identical or not, according to the received authentication request and the correlation; and, in a case where the received current system integrity value of the waiting to access the computer in the received authentication request and the stored system integrity value of the waiting to access the computer are identical, determines the network access authentication device that the network access is authenticated, wherein the current system integrity value is a basic system integrity value or a system integrity value, which is calculated with a basic system integrity value and a module for network access; and wherein the process of calculating its basic system integrity value comprises the following steps: ...