Which symmetric block cipher requires a key size of 128, 192, or 256 bits?

Camellia is a symmetric block cipher that supports key sizes of 128, 192, or 256 bits, making it versatile for different security requirements. It was designed to provide a strong encryption mechanism that is both efficient and secure, making it suitable for various applications, including in software and hardware implementations.

The flexibility in key size allows users to choose the level of security they need, with longer keys generally offering stronger encryption against brute-force attacks. In contrast, other ciphers like Blowfish and Twofish have maximum key sizes that differ from Camellia, while 3DES operates with a fixed key size method that doesn't match the specified options in this question. Camellia’s design also emphasizes efficiency in both encryption and decryption processes, further establishing its utility in modern cryptographic applications.