Which cryptographic scheme provides both authentication and secrecy for a message using block ciphers?
- AES-GCM
- Diffie-Hellman Key Exchange
- HMAC (Hash-based Message Authentication Code)
- RSA
AES-GCM (Advanced Encryption Standard-Galois/Counter Mode) is a cryptographic scheme that combines block cipher (AES) with a mode of operation (GCM) to provide both authentication and secrecy for a message. It ensures the message's confidentiality and verifies its authenticity.
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