Dynamic cipher method, system and dynamic cipher card
A dynamic password and password card technology, applied in the field of identity authentication, can solve problems such as customer fund loss, achieve security assurance, a good development environment, and avoid fund loss
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[0027] The present invention is a kind of security authentication method that realizes online online payment by using a dynamic password card, and it includes two aspects:
[0028] 1) The dynamic password card is a randomly generated card for customer identity authentication, and its coordinate value is guaranteed uniqueness and randomness through a certain random number generation algorithm;
[0029] SHA1PRNG: It is a random number generation (PRNG) algorithm, which conforms to the IEEEEP1363 standard, uses SHA1 as the basis of PRNG, and calculates the SHA1 hash on a true random seed value, which is combined with a 64-bit counter Connected together, the value is increased by 1 every time the operation is performed. After calculating the SHA1 hash for the true random seed value, only 64 bits are used from the 160-bit SHA1 output.
[0030] 2) By adopting a secure identity authentication mechanism based on Challenge / Response (Challenge / Response), it is guaranteed that the challe...
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