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AES (Advanced Encryption Standard) is a symmetric encryption algorithm widely used to secure sensitive data. In Python, the cryptography library provides a simple and secure way to implement AES, especially in GCM mode, which offers both confidentiality and integrity.
Example: Encrypting and Decrypting with AES-GCM
import base64import randomimport stringfrom cryptography.hazmat.primitives.ciphers.aead import AESGCMdef encrypt_with_aes(plaintext: str, key: str, nonce: str) -> str:aesgcm = AESGCM(key.encode())ciphertext = aesgcm.encrypt(nonce.encode(), plaintext.encode(), None)return base64.b64encode(ciphertext).decode()def decrypt_with_aes(ciphertext_b64: str, key: str, nonce: str) -> str:aesgcm = AESGCM(key.encode())ciphertext = base64.b64decode(ciphertext_b64)decrypted = aesgcm.decrypt(nonce.encode(), ciphertext, None)return decrypted.decode()def generate_nonce(length=12) -> str:chars = string.ascii_letters + string.digits + "#$()*+,-.:;<=>?@[]_"return ''.join(random.choices(chars, k=length))# 32-character (256-bit) secret keysecret_key = "1Xt5YfM4ZNuFdwp3OfVkwkhhQLagWKtt"nonce = generate_nonce()message = "This is a top secret message"encrypted_text = encrypt_with_aes(message, secret_key, nonce)print("Ciphertext:", encrypted_text)decrypted_text = decrypt_with_aes(encrypted_text, secret_key, nonce)print("Decrypted:", decrypted_text)Copied!✕Copy Python: How to Encrypt and Decrypt with AES - DEV …
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