A Note on the Block Cipher Camellia
Yiqun Lisa Yin · 2000
. Camellia is a block cipher jointly developed by NTT and Mitsubishi in 2000. In this note, we describe some observations on the design of the cipher. 1 Introduction Camellia [1] is a block cipher jointly developed Nippon Telegraph and Telephone Corporation and Mitsubishi Electric Corporation in 2000. It is one of the proposals submitted to ISO/IEC JTC 1/SC 27 for consideration as an international encryption standard. The joint e#ort combines expertise in cipher design from both companies. As a result, Camellia certainly bears some nice features of E2 [9] (designed by NTT) and MISTY [5] (designed by Mitsubishi). In this note, we describe some observations on Camellia in terms of its security. Our analysis is based on the specification of Camellia [1], a short proposal to ISO [11] as well as existing analysis on E2 [10] and MISTY [5]. The main objectives of our analysis is to give some outsider's opinions on the design of Camellia and to contribute to the continued analysis of the ...