9-Amaliy ish Jurayev Toxir Javhar o‘g’li

L_n = R_n-1
R_n = L_n-1 + f(R_n-1,K_n)
(1 - ROUND)
K₁= 000000111100000110100101100101100001101001010000
L₁ = R₀ = 00000000000000000010010011110101
E BIT-SELECTION TABLE

32 1 2 3 4 5

4 5 6 7 8 9
8 9 10 11 12 13
12 13 14 15 16 17
16 17 18 19 20 21
20 21 22 23 24 25
24 25 26 27 28 29
28 29 30 31 32 1
E(R₀) = 100000000000000000000000000100001001011110101010
K₁= 000000111100000110100101100101100001101001010000
K₁+E(R₀) = 100000111100000110100101100001101000110111111010

K_n + E(R_n-1) =B₁B₂B₃B₄B₅B₆B₇B₈
S₁(B₁)S₂(B₂)S₃(B₃)S₄(B₄)S₅(B₅)S₆(B₆)S₇(B₇)S₈(B₈)

SATR USTUN
0 - 00 0 – 0000 8 - 1000
1 – 01 1 – 0001 9 - 1001
2 – 10 2 – 0010 10 - 1010
3 – 11 3 – 0011 11- 1011
4 – 0100 12 - 1100
5 – 0101 13 - 1101
6 – 0110 14 - 1110
7 – 0111 15 – 1111
K₁ + E(R_1-1) = 100000 111100 000110 100101 100001 101000 110111 111010
S₁(B₁) = (10)=(0000) = 0100
S₂(B₂) = (10) = (1110) = 0010
S₃(B₃) = (00) = (0011) = 1110
S₄(B₄) = (11) = (0010) = 1010
S₅(B₅) = (11) = (0000) = 1011
S₆(B₆) = (10) = (0100) = 0010
S₇(B₇) = (11) = (1011) = 1001
S₈(B₈) = (10) = (1101) = 0011

Endi,chiqqan natijani P – jadvalga solamiz :
P

16 7 20 21

29 12 28 17
1 15 23 26
5 18 31 10
2 8 24 14
32 27 3 9
19 13 30 6
22 11 4 25

f = P(S₁(B₁)S₂(B₂)...S₈(B₈))
S₁(B₁)S₂(B₂)S₃(B₃)S₄(B₄)S₅(B₅)S₆(B₆)S₇(B₇)S₈(B₈) = 0100 0010 1110 1010 1011001010010011
f = P(S₁(B₁)S₂(B₂)...S₈(B₈)) = 01100011011000111000100111000101
R₁ = L₀ + f(R₀ , K₁ ) = 11111111110000011110000000101010 + 01100011011000111000100111000101 = 10011101101000100110100111101111