192 bit key expansion system and method based on AES (advanced encryption standard)
A key expansion and bit-bit technology, which is applied in the key expansion of Advanced Encryption Standard AES, network communication, and data encryption fields, can solve the problems of increasing encryption time, large data volume, and reducing the efficiency of encryption process, etc., and achieve simplified judgment condition, the effect of reducing the number of loops
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[0062] Reference figure 1 , The 192-bit key expansion system of the present invention based on the advanced encryption standard AES includes: expansion counting unit 1, temporary storage unit 2, round key storage unit 3, cycle register 4, word cycle unit 5, replacement register 6, byte The replacement unit 7, the S box unit 8, the wheel constant selection unit 9, the exclusive OR register unit 10, the exclusive OR unit 11, and the cycle control unit 12. The S box unit 8 includes 4 ROMs pre-stored with S boxes: No. 0 ROM, No. 1 ROM, No. 2 ROM and No. 3 ROM; the exclusive OR register unit 10 includes 6 registers with a bit width of 32 bits: No. 0 register, No. 1 register, No. 2 register, No. 3 register, No. 4 register and Register No. 5; The XOR unit 11 includes 6 XOR subunits: XOR subunit 0, XOR subunit 1, XOR subunit 2, XOR subunit 3, XOR subunit 4 Unit and No. 5 XOR subunit. among them:
[0063] The expansion counting unit 1 is used to add one to the sequence number n, and out...
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