| Article ID: | iaor1992819 |
| Country: | Japan |
| Volume: | 39 |
| Issue: | 10 |
| Start Page Number: | 1439 |
| End Page Number: | 1450 |
| Publication Date: | Oct 1990 |
| Journal: | NTT R&D |
| Authors: | Shoji Miyaguchi, Sadami Kurihara, Kazuo Ohta, Hikaru Morita |
| Keywords: | communication, computers |
The FEAL-8 cipher has been already applied in many application fields; however, some users want to use upgraded versions to counter chosen plaintext attacks or exhaustive key search. In response to these demands, the authors have expanded the FEAL-8 cipher while guaranteeing upward compatibility. The expanded version makes the round number of cipher processings and key length (i.e., 64-bit key and 128-bit key) user options. FEAL-8 can be specified by the options. This paper discloses the specifications of the new FEAL cipher, and considers its design ideas, implementation and secure uses. [In Japanese.]