Digital abstract forming device and method, and CA signing system and method
A technology of digital digest and generating device, which is applied in the field of CA signature system and digital digest generating device, can solve problems such as the impact of electronic signature use, and achieve the effect of reducing the probability of collision possibility
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[0038] Such as figure 2 As shown, the digital digest generating device 2 according to the first embodiment of the present invention includes an original information converter 21 and a digital digest calculator 22 . The original information converter 21 performs simple function processing on the input original information S, such as swapping front and back, first odd digits and then even digits, shifting characters up by one, etc., to obtain transformed information S'. For example, assuming S=abcdefghijklmn, if the original information converter 21 performs the processing of the original information before and after swapping, then the obtained S'=nmlkjihgfedcba; , then the obtained S'=acegikmbdfhjln; if the original information converter 21 executes the process of shifting characters up by one on the original information, the obtained S'=bcdefghijklmno.
[0039] The original information converter 21 inputs the converted information S' into the digital digest calculator 22. T...
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