# Serli Hartati 20170801241 Kriptografi

```Nama : Fitria Fajri Utami
Nim : 20170801159
i
0
1
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7
8
9
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13
14
Isi Register
1111
0111
1011
0101
1010
1101
0110
0011
1001
0100
0010
0001
1000
1100
1110
Bit Keluaran
1
1
1
1
0
1
0
1
1
0
0
1
0
0
2.
1
b4
0
b3
1
1
b2
b1
Rumus Fungsi umpan balik :
b4 = f(b1,b4) = b1⊕b4
b4 = f(b1,b4) = 1⊕1 = 0
Register Geser
0
1
0
1
3.
0
b4
1
0
1
b3
b2
b1
Rumus Fungsi umpan balik :
b4 = f(b1,b4) = b1⊕b4
b4 = f(b1,b4) = 1⊕0 = 1
Register Geser
1
0
1
0
Cara Pembuktiannya :
1.
0
b4
b3
1
1
b2
b1
1
Rumus Fungsi umpan balik :
b4 = f(b1,b4) = b1⊕b4
b4 = f(b1,b4) = 1⊕0 = 1
Register Geser
1
b4
0
1
1
b3
b2
b1
4.
1
0
b4
b3
1
0
b2
b1
Rumus Fungsi umpan balik :
b4 = f(b1,b4) = b1⊕b4
b4 = f(b1,b4) = 0⊕1 = 1
Register Geser
1
1
0
1
5.
1
1
b4
b3
0
1
b2
b1
Rumus Fungsi umpan balik :
b4 = f(b1,b4) = b1⊕b4
b4 = f(b1,b4) = 1⊕1 = 0
Register Geser
0
1
1
0
6.
0
b4
1
b3
1
0
b2
b1
Rumus Fungsi umpan balik :
b4 = f(b1,b4) = b1⊕b4
b4 = f(b1,b4) = 0⊕0 = 0
Register Geser
0
0
1
1
7.
0
b4
0
b3
1
1
b2
b1
Rumus Fungsi umpan balik :
b4 = f(b1,b4) = b1⊕b4
b4 = f(b1,b4) = 1⊕0 = 1
Register Geser
1
0
0
1
8.
1
b4
0
b3
0
1
b2
b1
Rumus Fungsi umpan balik :
b4 = f(b1,b4) = b1⊕b4
b4 = f(b1,b4) = 1⊕1 = 0
Register Geser
0
1
0
0
9.
0
b4
1
b3
0
0
b2
b1
Rumus Fungsi umpan balik :
b4 = f(b1,b4) = b1⊕b4
b4 = f(b1,b4) = 0⊕0 = 0
Register Geser
0
0
1
0
10.
0
b4
0
b3
1
0
b2
b1
Rumus Fungsi umpan balik :
b4 = f(b1,b4) = b1⊕b4
b4 = f(b1,b4) = 0⊕0 = 0
Register Geser
0
0
0
1
11.
0
b4
0
b3
0
1
b2
b1
Rumus Fungsi umpan balik :
b4 = f(b1,b4) = b1⊕b4
b4 = f(b1,b4) = 1⊕0 = 1
Register Geser
1
0
0
0
12.
1
b4
0
b3
0
0
b2
b1
Rumus Fungsi umpan balik :
b4 = f(b1,b4) = b1⊕b4
b4 = f(b1,b4) = 0⊕1 = 1
Register Geser
1
1
0
0
13.
1
b4
1
b3
0
0
b2
b1
Rumus Fungsi umpan balik :
b4 = f(b1,b4) = b1⊕b4
b4 = f(b1,b4) = 0⊕1 = 1
Register Geser
1
1
1
0
14.
1
b4
1
b3
1
0
b2
b1
Rumus Fungsi umpan balik :
b4 = f(b1,b4) = b1⊕b4
b4 = f(b1,b4) = 0⊕1 = 1
Register Geser
1
1
1
1