Which encryption method is known for both speed and providing integrity checks through its associated data?

The encryption method recognized for its rapid performance and ability to provide integrity checks through associated data is GCM (Galois/Counter Mode). GCM combines the operations of encryption and authentication in a highly efficient manner, making it suitable for high-speed applications where both security and performance are critical.

GCM operates in a way that allows it to encrypt data using the counter mode of operation while simultaneously generating an authentication tag. This tag ensures data integrity and authenticity, providing a clear verification mechanism that can detect tampering. The mode is particularly effective in environments requiring quick data processing, such as network traffic encryption.

In contrast, methods like CBC (Cipher Block Chaining) lack built-in authentication and require separate mechanisms for integrity checks, making them slower and more complex in their implementation. Options like ChaCha and 3DES also do not offer the same combination of speed and integrated integrity checks that GCM provides. 3DES, especially, is less efficient compared to modern encryption methods like GCM. This unique combination of speed and integrated integrity checks makes GCM the preferred choice in numerous practical applications.