On Thu, Mar 3, 2011 at 11:35, Tony Godshall <[email protected]> wrote: > On Wed, Mar 2, 2011 at 12:53, Jonas Smedegaard <[email protected]> wrote: >> On Wed, Mar 02, 2011 at 03:34:18PM -0500, Jay Sulzberger wrote: >> >>> And ZRTP: >>> >>> http://en.wikipedia.org/wiki/ZRTP >> >> Sorry, but this is not Free Software. Yes, advertised as such, but try >> actually fetch the code and it turns out it isn't - and there is no response >> when emailing them asking nicely about it. >> >> Please do prove me wrong! >> >> >> - Jonas > > > Ah, Phil Zimmerman. Creator of PGP. Open source -> publicity -> > closed -> profit. I think I see a pattern...
OK, so ZRTP is a proposed open standard. Not a program. Proposed RFP by Phil Zimmerman et al is here: http://www.zfone.com/docs/ietf/draft-zimmermann-avt-zrtp-23x.html Phil Zimmerman et al and implement protocol in proprietary program zphone. Zphone FAQ at makes it clear that zphone is not open source[1] Wikipedia indicates there are four purported free implementations[2]. I have not validated that claim. Nor the definition of "free" in that context. References to "GNU ZRTP" and "libzrtp" are worth pursuing... Tony [1] quote from http://www.zfone.com/faq.html >From it's FAQ: Q: Is Zfone open source? A: No. The Zfone application is not available under the GPL, the AGPL, or any other open source license. However, the Zfone libZRTP SDK library is published under the AGPL open source license. The SDK is also available under a commercial license, in a dual-licensing model. See our Licensing Policy page for details. I'm a firm believer in publishing the source code for cryptographic software for peer review, to build public confidence that it contains no back doors, a tradition I started in 1991 with PGP. PGP is a proprietary product, even though the source code is available for peer review. Publishing the source code for peer review is not the same as making it availble under an open source license. Zfone has several major components, and not all of them are published under the same licensing terms. The entire body of source code for the complete Zfone client software is published for peer review purposes. In addition, the Zfone libZRTP SDK library is published under the AGPL version 3. However, the rest of the Zfone application remains proprietary. That's why we show you an End User License Agreement before you download Zfone. [2] https://secure.wikimedia.org/wikipedia/en/wiki/ZRTP Free ZRTP implementation * SFLphone has ZRTP support integrated and is available under GNU General Public License. * Twinkle uses GNU ccRTP and GNU ZRTP to implement the ZRTP support. All these packages are available under the GNU General Public License. * SIP Communicator supports ZRTP through the ZRTP4J lib. Full support is available in the release candidates and is also scheduled for inclusion in the final 1.0 release. * FreeSWITCH currently has basic support for ZRTP through the libzrtp SDK. _______________________________________________ Freedombox-discuss mailing list [email protected] http://lists.alioth.debian.org/mailman/listinfo/freedombox-discuss
