Improved Results on Impossible Differential Cryptanalysis of Reduced-Round Camellia-192/256
The block cipher Camellia was jointly proposed by NTT and Mitsubishi Electric Corporations. It was then submitted to several standardization and evaluation projects such as the NESSIE Project and the Japanese CRYPTREC Evaluation. In 2002, Camellia was selected to be a CRYPTREC e-government recommended block cipher. In 2003, it was also recommended in the NESSIE block cipher portfolio. Finally, it was adopted as a new international standard by ISO/IEC in 2005. Camellia is a 128-bit block cipher.