The AESGCM.decrypt function in the Python cryptography library is used for decrypting data encrypted using the AES-GCM (Advanced Encryption Standard-Galois/Counter Mode) algorithm. AES-GCM is a popular symmetric encryption algorithm that provides both confidentiality and integrity protection for data. The decrypt function takes in the ciphertext (encrypted data), the associated data (additional authenticated data), and the encryption nonce (a unique value used only once during encryption) as input. It returns the decrypted plaintext if the authentication tag is successfully verified, and raises an exception if the authentication fails. This function plays a crucial role in securely decrypting AES-GCM encrypted data in Python applications.
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