from cryptography.hazmat.primitives.ciphers.aead import AESGCM
import os

def encrypt_data(plaintext: bytes, associated_data: bytes = None) -> tuple:
    key = AESGCM.generate_key(bit_length=256)
    aesgcm = AESGCM(key)
    nonce = os.urandom(12)  # 96-bit nonce for GCM
    ciphertext = aesgcm.encrypt(nonce, plaintext, associated_data)
    return key, nonce, ciphertext

def decrypt_data(key: bytes, nonce: bytes, ciphertext: bytes, associated_data: bytes = None) -> bytes:
    aesgcm = AESGCM(key)
    return aesgcm.decrypt(nonce, ciphertext, associated_data)

# שימוש
key, nonce, encrypted = encrypt_data(b"sensitive data", b"context info")
original = decrypt_data(key, nonce, encrypted, b"context info")

Cryptography — הצפנה סימטרית, א-סימטרית, Hashing

Cryptography — הצפנה סימטרית, א-סימטרית, Hashing

Cryptography — הצפנה סימטרית, א-סימטרית, Hashing