This is a code for Diffie–Hellman key exchange using C programming language.
Diffie–Hellman key exchange:-
Source code:-
#include <stdio.h>
int compute(int a, int m, int n)
{
int r;
int y = 1;
while (m > 0)
{
r = m % 2;
if (r == 1)
y = (y*a) % n;
a = a*a % n;
m = m / 2;
}
return y;
}
int main()
{
int p = 23;
int g = 5;
int a, b;
int A, B;
a = 6;
A = compute(g, a, p);
b = 15;
B = compute(g, b, p);
int keyA = compute(B, a, p);
int keyB = compute(A, b, p);
printf("Alice's Secret Key is %d\nBob's Secret Key is %d", keyA, keyB);
return 0;
}
Output:-
