Cybersecurity

Cryptography using cybersecurity from Crypto.PublicKey import RSA from Crypto.Cipher import PKCS1_OAEP

class User: def init(self, name): self.name = name self.private_key = RSA.generate(2048) self.public_key = self.private_key.publickey()

def encrypt_message(message, public_key): cipher = PKCS1_OAEP.new(public_key) cipher_text = cipher.encrypt(message.encode()) return cipher_text

def decrypt_message(cipher_text, private_key): cipher = PKCS1_OAEP.new(private_key) decrypted_message = cipher.decrypt(cipher_text) return decrypted_message.decode()

def send_encrypted_message(sender, receiver, message): encrypted_message = encrypt_message(message, receiver.public_key) decrypted_message = decrypt_message(encrypted_message, receiver.private_key)

print(f"{sender.name} sends an encrypted message to {receiver.name}:")
print(f"Encrypted Message: {encrypted_message}")
print(f"{receiver.name} decrypts the message: {decrypted_message}\n")

Example Usage:

user1 = User("Alice") user2 = User("Bob")

message1 = "Hello Bob, how are you?" send_encrypted_message(user1, user2, message1)

message2 = "Hi Alice, I'm doing well. How about you?" send_encrypted_message(user2, user1, message2)