What is the key size used in Clefia encryption?

The key size used in Clefia encryption is indeed 128, 192, or 256 bits. Clefia is a block cipher designed for lightweight environments, and these key sizes are aimed at providing a reasonable balance between security and performance. The design supports multiple key lengths to cater to different security requirements and application needs, allowing users to choose the size that meets their specific security criteria.

Using key sizes of 128, 192, or 256 bits enhances the security of the encryption, making it robust against various cryptographic attacks while still being efficient enough for practical use in constrained environments, such as embedded systems. This adaptability has made Clefia a favorable choice in applications where both performance and security are crucial.