Camellia is a US Advanced Encryption Standard AES compatible block cipher developed by NTT and Mitsubishi Electric which have top classed cryptography researchers. Camellia has excellent efficiency; fast implementations can be made on any software platforms, and not only fast but also compact implementations can be made on hardware. To promote Camellia further, NTT and Mitsubishi Electric submitted Camellia to * ISO/IEC JTC 1/SC 27, * Cryptographic Techniques applicable to the Japanese electronic government , and * NESSIE.