The GSM compression and decompression code was developed by Jutta Degener and Carsten Bormann of the Communications and Operating Systems Research Group, Technische Universität Berlin: Fax: +49.30.31425156, Phone: +49.30.31424315. They note that THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE. Please see the README and COPYRITE files in the gsm directory of the source code distribution for further details.
The ADPCM compression and decompression code was developed by Jack Jansen of the Centre for Mathematics and Computer Science, Amsterdam, The Netherlands. Please see the README and COPYRITE files in the adpcm directory for further details.
The DES encryption code was developed by Phil Karn, KA9Q. Please see the README file in the des directory of the source code distribution for further details.
The IDEA algorithm was developed by Xuejia Lai and James L. Massey, of ETH Zürich. The implementation used in Speak Freely was modified and derived from original C code developed by Xuejia Lai and optimized for speed by Colin Plumb <email@example.com>. The IDEA encryption algorithm is patented and may not be used commercially without a license; see "Patent issues" for further details.
The MD5 message-digest algorithm implementation is based on a public domain version written by Colin Plumb in 1993. The algorithm is due to Ron Rivest.
The experimental Linear Predictive Coding (LPC) compression code was developed by Ron Frederick of Xerox PARC.
The public domain implementation of U.S. Federal Standard 1015 LPC-10 compression algorithm was developed by the United States Department of Defense, National Security Agency (NSA). Please see the README and FAQ files in the lpc10 directory of the source code distribution for additional details.
The Voice Activation code, remote Break-in feature, the ability to
open additional connections by clicking
.SFX files while Speak Freely
is already running, and a work-around for Speak Freely hanging the
machine when the user has selected compression and encryption modes
which overload the CPU were contributed by Dave Hawkes, who also
discovered an elegant way to get Windows to do most of the work in