KCipher-2 explained

KCipher-2 is a stream cipher jointly developed by Kyushu University and Japanese telecommunications company KDDI. It is standardized as ISO/IEC 18033–4, and is on the list of recommended ciphers published by the Japanese Cryptography Research and Evaluation Committees (CRYPTREC). It has a key length of 128 bits, and can encrypt and decrypt around seven to ten times faster than the Advanced Encryption Standard (AES) algorithm.

References

• Book: Tettei Kōryaku: Jōhō Shori Anzen Kakuho Shienshi Kyōkasho. Comprehensive Strategy: Registered Information Security Specialist Textbook. Japanese. 2019. Seto. Mitsuki. Saitō. Ken'ichi. 2020. Impress.
• Web site: Hayai, Karui, Namae no Yurai ga Omoshiroi? Mobairu Kiki ni Tekishita Angōka Gijutsu "KCipher-2" to wa?. Hidaka. Akira. Fast, Light, a Name with an Interesting Origin? About "KCipher-2", an Encryption Algorithm Suited for Mobile Devices. 17 February 2012. Japanese. IT Media. 2 October 2020.

Notes and References

1. Web site: Product Outline｜KCipher-2 KDDI Research . live . https://web.archive.org/web/20260122194507/https://www.kddi-research.jp/english/products/kcipher2.html . 2026-01-22 . 2026-01-22 . www.kddi-research.jp . en.
2. A Description of the KCipher-2 Encryption Algorithm. 7008. S.. Kiyomoto. W.. Shin. August 2013. IETF.
3. Web site: 2013-03-26 . CRYPTRECの電子政府推奨暗号、国産の「Camellia」や「KCipher-2」などリスト入り 日経クロステック（xTECH） . live . https://web.archive.org/web/20260122195020/https://xtech.nikkei.com/it/article/NEWS/20130326/466241/ . 2026-01-22 . 2026-01-22 . 日経クロステック（xTECH） . ja.