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RSA

RSA strong authentication is extremely simple. The token issued to each user (an exquisite electronic device with a built-in battery and chip with a small LCD screen for displaying dynamic passwords) uses the same algorithm as the RSA authentication server in the background of the network center, which is related to time. A unique 128-bit seed has been built into the token (the initial value is the unique random value of each token generated mathematically). When the seed corresponding to the token (encrypted in the form of a file and stored in the CD and sold together with the token is called a seed file) is imported to the authentication server, at the same time, the token and the authentication server are calculated separately according to the same algorithm and the same seed. The results are the same. In this way, when the user logs in using this token, the authentication server can identify the identity of the visitor by comparing the results of the operation.