A method and device for generating a fixed-length serial number
A fixed-length, serial number technology, applied in encryption devices with shift registers/memory, etc., can solve the problems of not conforming to the serial number mode and low safety factor, and achieve wide application, strong ease of use, and high efficiency. Effect
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[0022] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments. It should be understood that the following examples are only used to illustrate and explain the present invention, but not to limit the technical solution of the present invention.
[0023] Such as figure 1 As shown, the flow process of the method embodiment of generating a fixed-length serial number of the present invention is represented, including steps:
[0024] 110: Encrypt the plaintext serial number through the DES symmetric encryption algorithm to generate a 26-bit ciphertext serial number;
[0025] 120: Encode the 26-bit ciphertext serial number through Base32, and carry the agreed one bit information in the Base32 encoding of the 26-bit ciphertext serial number on the agreed two bits in the Base32 encoding of other ciphertext serial numbers, changing Encoded into a 25-digit ciphertext serial number.
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