DES algorithm combines the 64 expressly to block the importation of 64 of the ciphertext output block, it is also the key 64, first of all, DES importation of 64 data blocks per caput regrouped and the output is divided into L0, R0 two parts, each of the 32 long, and pre- and post exchange (the importation of 58 account for one, 50 for the first of two, and so forth. the final one is the original clause 7), and ultimately by the L0 32 left output, the output right R0 32, Under this rule after 16 iterations operator, was L16, R16 and as input, with the initial replacement for the opposite inverse replacement, which is the output ciphertext.

Packet : 277967422_des.rar filelist
2_des\des\Debug
2_des\des\des.dsp
2_des\des\des.dsw
2_des\des\des.h
2_des\des\des.ncb
2_des\des\des.opt
2_des\des\des.plg
2_des\des\G__des.c
2_des\des\test.cpp
2_des\des
2_des\des.bat
2_des\des.exe
2_des

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