CLEFIA is a block encryption technology announced by Sony in 2007. Based on state-of-the-art cipher design technology, CLEFIA ensures excellent security and achieves the previously impossible goal of providing world-class performance in both hardware and software implementations. In addition to its proven circuit efficiency in hardware implementations, CLEFIA is also capable of high-speed operation when implemented in software, regardless of the type of CPU used.

http://www.sony.net/Products/cryptography/clefia/