Реферат: Шифрование DES - теория и практика

L(10) = R(9) = 00000111000110011111011101010011

E(R10) = 000100001100001001010000000110100001011011110100

R(10) XOR K(11) = 000111111000001110001001000000110000100001111000

S(1..8) = 01001001010101100010011101101111

P = 00001100011110111111110010101000

R(10) XOR L(10) = 00001011011000100000101111111011 = R(11)

L(11) = R(10) = 00100110010010000011000011011010

E(R11) = 100001010110101100000100000001010111111111110110

R(11) XOR K(12) = 100110100010101010011101110111010000111101000111

S(1..8) = 10001110111111101001000000111000

P = 01101111110010010001010101010100

R(11) XOR L(11) = 01001001100000010010010110001110 = R(12)

L(12) = R(11) = 00001011011000100000101111111011

E(R12) = 001001010011110000000010100100001011110001011100

R(12) XOR K(13) = 001110100011010110001011101100111101011001110001

S(1..8) = 10001000011111110111100000101111

P = 10111100110011110001110011100100

R(12) XOR L(12) = 10110111101011010001011100011111 = R(13)

L(13) = R(12) = 01001001100000010010010110001110

E(R13) = 110110101111110101011010100010101110100011111111

R(13) XOR K(14) = 110000011101010111010111001110001101000101101101

S(1..8) = 11111011111011000110100110111000

P = 01011010100011011111011111000111

R(13) XOR L(13) = 00010011000011001101001001001001 = R(14)

L(14) = R(13) = 10110111101011010001011100011111

E(R14) = 100010100110100001011001011010100100001001010010

R(14) XOR K(15) = 100100110100010011010101110011110100000101100101

S(1..8) = 11101100100000101111010010111110

P = 00101011110011101000011110111001