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| General | |
|---|---|
| Designers | |
| First published | 2007 |
| Certification | CRYPTREC |
| Cipher detail | |
| Key sizes | 128 bits |
| State size | 640 bits |
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.