Brief description des
2016-08-23
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First delivery of gold into the 10bit Yao, then the document into the 8bit clear, then ecryption that concluded that encryption and decryption.
Process section:
1. Two keys are needed, enter the 10-digit key, and then key[10] permutation (similar to IP in a DES replacement), and the results were divided into two groups, is set to tempr[0 and templ[0~4}];2. Circular left 1 bit operations each of the two groups, get a L1 and R1;
3. Merge the L1 and R1, and P8 merged data replacement, resulting in 8-bit keys K1;
4. L1 and R1 again to loop left 2 bit operation by L2 and R2;
5. Merge the L2 and R2, and P8 merged data replacement, to 8-digit key K2;
Plaintext encryption:
1. IP_a to 8 clear-text replacement to get temp;
2. TEMP and tempr templ is divided into two parts, then templ and tempr transform into FK
3. FK, E/P tempr firstly extend eight transformed four M1R, and eight to die-2 addition to be performed
c++
des
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