What is the maximum key size that can be used in Blowfish encryption?

Blowfish encryption supports variable key sizes ranging from a minimum of 32 bits to a maximum of 448 bits. This flexibility allows users to choose a key size that meets their security needs while also balancing performance considerations. The 448 bits represent a very strong level of security, making it suitable for sensitive data encryption. Keys longer than 448 bits are not supported by the Blowfish algorithm, as the design and implementation are optimized for that key size limit. Therefore, the correct answer reflects the highest theoretically usable key length in Blowfish encryption as determined by its design specifications.