Which protocol provides authenticated encryption with associated data (AEAD) in high-performance symmetric encryption?

Which protocol provides authenticated encryption with associated data (AEAD) in high-performance symmetric encryption?

• A. AES Galois Counter Mode Protocol (GCMP)
• B. AES Galois Counter Mode (GCM)
• C. ChaCha20-Poly1305
• D. AES-CBC-HMAC

Answer: (A)

Authenticated encryption with associated data combines confidentiality and integrity in one ordinary operation, while also allowing data that isn’t encrypted to be bound to the authentication tag. The best fit here is GCMP, the AES Galois Counter Mode Protocol. It pairs AES in counter mode for encryption with a Galois field-based authentication that is optimized for high-speed authentication calculations. This design minimizes overhead and efficiently uses hardware support for the Galois field operations, enabling very high throughput in environments like network devices and high-speed TLS implementations. AES-GCM is also an AEAD method and fast, but GCMP is specifically engineered to maximize performance in hardware-accelerated contexts, often delivering higher throughput for the same security guarantees. ChaCha20-Poly1305 is a strong AEAD option that shines in software without AES acceleration, but it’s not the AES-based high-performance path emphasized by GCMP. AES-CBC-HMAC is not an AEAD construction; it combines encryption and authentication separately, which adds complexity and separate processing, not the integrated AEAD provided by GCMP. So, for high-performance symmetric encryption with authenticated encryption and associated data, GCMP is the best-suited choice.

Authenticated encryption with associated data combines confidentiality and integrity in one ordinary operation, while also allowing data that isn’t encrypted to be bound to the authentication tag. The best fit here is GCMP, the AES Galois Counter Mode Protocol. It pairs AES in counter mode for encryption with a Galois field-based authentication that is optimized for high-speed authentication calculations. This design minimizes overhead and efficiently uses hardware support for the Galois field operations, enabling very high throughput in environments like network devices and high-speed TLS implementations.

AES-GCM is also an AEAD method and fast, but GCMP is specifically engineered to maximize performance in hardware-accelerated contexts, often delivering higher throughput for the same security guarantees. ChaCha20-Poly1305 is a strong AEAD option that shines in software without AES acceleration, but it’s not the AES-based high-performance path emphasized by GCMP. AES-CBC-HMAC is not an AEAD construction; it combines encryption and authentication separately, which adds complexity and separate processing, not the integrated AEAD provided by GCMP.

So, for high-performance symmetric encryption with authenticated encryption and associated data, GCMP is the best-suited choice.