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- IDEA (International Data Encryption Algorithm), formerly known as IPES
- (Improved Proposed Encryption Standard).
-
- Algorithm developed by Xuejia Lai and James L. Massey, of ETH Zurich.
- This implementation modified and derived from original C code
- developed by Xuejia Lai.
-
- Extensively optimized and restructured by Colin Plumb.
-
- The IDEA algorithm was developed by Xuejia Lai and James L. Massey, of
- ETH Zurich. The implementation used in Netfone was modified and
- derived from original C code developed by Xuejia Lai and optimized for
- speed by Colin Plumb <colin@nsq.gts.org>. The IDEA[tm] block cipher
- is patented by Ascom-Tech AG. The Swiss patent number is
- PCT/CH91/00117, the European patent number is EP 0 482 154 B1, and the
- U.S. patent number is US005214703. IDEA[tm] is a trademark of
- Ascom-Tech AG. There is no license fee required for noncommercial use.
- Commercial users may obtain licensing details from Dr. Dieter Profos,
- Ascom-Tech AG, Solothurn Lab, Postfach 151, CH-4502 Solothurn,
- Switzerland, Tel +41 65 242 885, Fax +41 65 235 761.
-
- For further information on the IDEA cipher, see: Xuejia Lai. "On the
- Design and Security of Block Ciphers", ETH Series on Information
- Processing (ed. J.L. Massey) Vol 1. Hartung-Gorre Verlag, Konstanz,
- Switzerland, 1992. ISBN 3-89191-573-X.
-