تنفيذ عملية تبادل المفاتيح - كتاب الأمن السيبراني - الصف 12 - الفصل 1 - المملكة العربية السعودية

--- SECTION: إعداد الخوارزمية --- إعداد الخوارزمية (Preparing the Algorithm) import random import hashlib # Modular exponentiation: (base^exponent) % modulus def mod_exp(base, exponent, modulus): return pow(base, exponent, modulus) # Generate a large prime number def generate_large_prime(bits=2048): return random.getrandbits(bits) | 1 # Command to create a prime number --- SECTION: تنفيذ عملية تبادل المفاتيح --- تنفيذ عملية تبادل المفاتيح (Implementing the Key Exchange) def dh_key_exchange(): # Agree on large prime numbers p and g p = generate_large_prime() g = generate_large_prime() # Each party selects a private key ali_private_key = generate_large_prime() ahmed_private_key = generate_large_prime() # Each party computes their public key ali_public_key = mod_exp(g, ali_private_key, p) ahmed_public_key = mod_exp(g, ahmed_private_key, p) # Each party exchanges their public key and computes the shared secret ali_shared_secret = mod_exp(ahmed_public_key, ali_private_key, p) ahmed_shared_secret = mod_exp(ali_public_key, ahmed_private_key, p) # Verify that the shared secrets match assert ali_shared_secret == ahmed_shared_secret # Optionally, hash the shared secret to derive a symmetric key shared_secret_hash = hashlib.sha256(str(ali_shared_secret).encode()).hexdigest() return shared_secret_hash --- SECTION: توليد المفتاح السري المشترك --- توليد المفتاح السري المشترك (Generating the Secret Shared Key) # Produce the shared secret key shared_secret = dh_key_exchange() print("Shared secret:", shared_secret) Shared secret: 74b40ad75c4d76edcef424bcb1e27be104c60c22072e0aad65b5a29b60d1ddab --- SECTION: Footer --- وزارة التعليم Ministry of Education 2025 - 1447 --- SECTION: Page Number --- 124