Algoritma RSA
Contoh Algoritma RSA
Misalkan
p = 3
q = 7
n = p.q
= 3 x 7
= 21
m = (p-1) (q-1)
= (3 -1)(7 – 1)
= 12
e * d mod 12 = 1
e = 5
d = 17
public key = (e,n) = (5,21)
private key = (d,n) = (17,21)
T O M I
84 79 77 73
Proses Enkripsi dan Deskripsi
T = 84
Enkripsi
|
Deskripsi
|
C = M ^ e mod n
|
M = C ^ d mod n
|
8 ^ 5 mod 21 = 8
|
8 ^ 17 mod 21 = 8
|
4 ^ 5 mod 21 = 16
|
16 ^ 17 mod 21 = 4
|
O = 79
Enkripsi
|
Deskripsi
|
C = M ^ e mod n
|
M = C ^ d mod n
|
7 ^ 5 mod 21 = 7
|
7 ^ 17 mod 21 = 7
|
9 ^ 5 mod 21 = 18
|
18 ^ 17 mod 21 = 9
|
M = 77
Enkripsi
|
Deskripsi
|
C = M ^ e mod n
|
M = C ^ d mod n
|
7 ^ 5 mod 21 = 7
|
7 ^ 17 mod 21 = 7
|
7 ^ 5 mod 21 = 7
|
7 ^ 5 mod 21 = 7
|
I = 73
Enkripsi
|
Deskripsi
|
C = M ^ e mod n
|
M = C ^ d mod n
|
7 ^ 5 mod 21 = 7
|
7 ^ 17 mod 21 = 7
|
3 ^ 5 mod 21 = 12
|
12 ^ 17 mod 21 = 3
|
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