Speak Freely for Windows
Encryption patent issues
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
You can use IDEA encryption for noncommercial communications without a
license from Ascom-Tech; commercial use is prohibited without a license. If
you don't want to obtain a license from Ascom-Tech, use DES or key
file encryption instead.