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[Fwd: Re: GNU Telephony Releases VoIP Encryption per Zimmermann's ZRTP and RFC 3711]
Yes, I know: it is not in direct relationship with our project.
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From: Philip Zimmermann <prz@mit.edu>
Subject: Re: GNU Telephony Releases VoIP Encryption per Zimmermann's
ZRTP and RFC 3711
Date: Sun, 1 Oct 2006 21:27:34 -0700
To: Seth Johnson <seth.johnson@realmeasures.dyndns.org>
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I'm sending this out as a group reply to Seth's note. This is just a
note to let folks know that today I published a new web site (http://
zfoneproject.com) which announces that my own libZRTP SDK that
implements the ZRTP protocol will be available under the GPL. This
SDK can be used in many open source projects. I also include a FLOSS
exception in the GPL licensing, to allow it to be used in a variety
of other non-GPL open source projects.
We're still changing the protocol, to implement video conferencing
correctly (we had some protocol bugs in that scenario), but should
have that working this week sometime. This will require a change in
the ZRTP protocol spec that will cause interoperability problems.
You see the perils of premature standardization. I waited 5 years
for PGP to mature before introducing the OpenPGP RFC.
I am talking to Werner Dittmann about the changes to the spec for
video, so the interoperability issues should be resolved soon enough
for his ZRTP implementation.
Phil Zimmermann
http://philzimmermann.com (spelled with 2 N's)
On Oct 1, 2006, at 5:41 PM, Seth Johnson wrote:
-------- Original Message --------
Subject: Re: Secure Call announcement, for immediate review and
comment
Date: Sun, 1 Oct 2006 18:04:00 -0400
From: David Sugar <dyfet@gnu.org>
To: Seth Johnson <seth.johnson@RealMeasures.dyndns.org>
CC: David Sugar <dyfet@gnu.org>, jays@panix.com
< SNIP >
---
October 1, 2006; Bayonne NJ --- GNU Telephony is happy to
announce that with the latest release of the GNU RTP Stack, GNU
ccrtp 1.5, we are introducing a free software framework for
developing both the secure RTP profile for VOIP (as defined by
RFC 3711), and also a GNU GPL licensed implementation of Phil
Zimmermann's ZRTP protocol for voice encryption as used in
"Zfone". By offering a native secure RTP framework that can be
directly embedded in newly developed VOIP applications, GNU
Telephony intends to promote the development and widespread use
of secure and intercept free voice and video communication
services worldwide.
The Twinkle softphone package, immediately available with
SRTP/ZRTP support, is the first complete free software package to
make use of Secure call features offered in the GNU RTP Stack.
The GNU RTP stack can be used to develop secure communications
for GNU/Linux hosted applications. The stack may also be used to
develop application on various BSD systems including Mac OS/X, on
Microsoft Windows, and even for embedded systems. We have tested
and built the GNU RTP Stack with Handhelds Open Embedded build
environment, and we look forward to implementing a Twinkle based
secure calling solutions on Linux kernel powered cell phones in
the future.
Securing RTP sessions is part of our vision in GNU Telephony to
help make passive voice communication intercept a thing of the
past. By making "secure by design" encryption capabilities simple
to embed, and by enabling the largest possible participation in
developing such solutions through free software, we hope to break
down those remaining barriers that prevent secure telephony from
being widely deployed over next generation telephone networks.
Part of this vision includes offering TLS encapsulated SIP over
TCP, and deployment of anonymous calling proxies, to further deny
passive data mining of call session and connection associative
information in the future.
Downloads:
http://ftp.gnu.org/pub/gnu/commoncpp/commoncpp2-1.5.0.tar.gz
http://ftp.gnu.org/pub/gnu/ccrtp/ccrtp-1.5.0.tar.gz
http://ftp.gnu.org/pub/gnu/ccrtp/libzrtpcpp-0.9.0.tar.gz
http://www.xs4all.nl/~mfnboer/twinkle/download/twinkle-0.9.tar.gz
Additional Resources:
Phil Zimmermann's zrtp specification;
http://www.infosecwriters.com/text_resources/pdf/Zfone_SSotillo.pdf.
Zfone project;
http://www.philzimmermann.com/zfoneproject/index.html.
GNU Telephony Secure Calling;
http://wiki.gnutelephony.org/index.php/Secure_Call. Twinkle
Softphone;
http://www.twinklephone.com/.
Open Embedded;
http://www.handhelds.org/geeklog/index.php.
About GNU Telephony:
GNU Telephony is a meta project dedicated to the development and
promotion of the use of free software for telephony. GNU
Telephony is used to directly support the GNU Common C++ family
of libraries and telephony application servers such as GNU
Bayonne, which are part of the GNU Project, as well as other
packages that we regularly use. We will also support several
special projects from this site, including CAPE runtime
libraries, Secure Calling, and GNU Telephony Open Embedded.
----------------------------------------------
Philip R Zimmermann prz@mit.edu
http://philzimmermann.com tel +1 650 322-7223
(spelled with 2 n's) fax +1 650 322-7877
--
Anatoly Volynets, Co-Founder
total-knowledge.com
culturedialogue.org