Which is an example of a symmetric encryption algorithm?

The Advanced Encryption Standard (AES) is a widely recognized symmetric encryption algorithm. What defines symmetric encryption is that the same key is used for both encryption and decryption processes. This characteristic allows for efficient processing and is particularly suitable for encrypting large amounts of data. AES operates on fixed block sizes (128 bits) and supports key sizes of 128, 192, or 256 bits, making it versatile and robust against various forms of cryptographic attacks.

Unlike symmetric algorithms, RSA is an asymmetric encryption algorithm that employs a pair of keys (public and private) for encryption and decryption. Blowfish, while also a symmetric encryption algorithm, is less commonly used today compared to AES, which has been established as a global standard due to its effectiveness and security. Diffie-Hellman is not an encryption algorithm but rather a key exchange protocol, allowing two parties to securely share a secret key over an insecure channel. Understanding these distinctions is crucial when studying encryption methodologies and their applicable contexts.