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<!DOCTYPE html> <html> <body> <h1>Diffie-Hellman Key Exchange Mechanism</h1> <p>Exp 2: Implement the Diffie-Hellman Key Exchange mechanism using HTML and JavaScript. Consider the end user as one of the parties (Alice) and the JavaScript application as the other party (Bob).</p> </body> <script> function power(base, exp, mod) { let result = 1; base = base % mod; while (exp > 0) { if (exp % 2 === 1) { // If exponent is odd, multiply base with result result = (result * base) % mod; } exp = Math.floor(exp / 2); // Divide exponent by 2 base = (base * base) % mod; // Square the base } return result; } var P, G, Alice_private, Bob_private, Alice_x, Bob_y, Ka, Kb; // Publicly chosen prime numbers P = 23; G = 9; document.write("The value of first prime number P: " + P + "<br>"); document.write("The value of second prime number G: " + G + "<br>"); // Private keys chosen by Alice and Bob Alice_private = 4; Bob_private = 3; // Compute public values Alice_x = power(G, Alice_private, P); Bob_y = power(G, Bob_private, P); // Compute shared secret keys Ka = power(Bob_y, Alice_private, P); Kb = power(Alice_x, Bob_private, P); document.write("The value of Alice's Secret key Ka: " + Ka + "<br><br>"); document.write("The value of Bob's Secret key Kb: " + Kb + "<br>"); </script> </html> } }
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