اختبار التشفير (Testing the Cipher) - كتاب الأمن السيبراني - الصف 12 - الفصل 1 - المملكة العربية السعودية

# Iterate through each character in the encrypted message for char in encrypted_message: # Check if character is a lowercase letter if char in alphabet_lower: # Find the index of the character in the lowercase alphabet list char_index = alphabet_lower.find(char) # Move the character to the left by the key new_char_index = (char_index - key) % 26 # Add the replaced character to the decrypted message decrypted_message += alphabet_lower[new_char_index] elif char in alphabet_upper: # Find the index of the character in the uppercase alphabet list char_index = alphabet_upper.find(char) # Move the character to the left by the key new_char_index = (char_index - key) % 26 # Add the replaced character to the decrypted message decrypted_message += alphabet_upper[new_char_index] else: # If the character is not a letter, add it to the decrypted message as it is decrypted_message += char # Return the decrypted message return decrypted_message اختبار التشفير (Testing the Cipher): # Testing the Caesar cipher message = "There are twenty three items in the inventory." key = 5 encrypted_message = caesar_encrypt(message, key) decrypted_message = caesar_decrypt(encrypted_message, key) print(encrypted_message) print(decrypted_message) Ymjmwj fwj ybjysyd ymwjj ns ymj nsajsywyd. There are twenty three items in the inventory. وزارة التعليم Ministry of Education 119 2025 - 1447 --- VISUAL CONTEXT --- **IMAGE**: Ministry of Education Logo Description: Logo of the Ministry of Education, featuring a stylized green pattern resembling dots or abstract foliage, with Arabic and English text below. Context: Branding and institutional identification for the textbook.