[OTR-dev] Codec2 and OTR

[Greg Troxel]

  tl;dr - There's a thing called 'codec2'
  http://www.rowetel.com/blog/?page_id=452  which achieves reasonable
  digital radio performance at 1200bps (although 2400bps is better)

  The thought bubble was: I wonder if/how/could (etc) OTR could be used
  to provide encrypted open source digital radio.

Some background and thoughts:

  In the Amateur Radio service, cryptography is (99.9%) not allowed.  So
  OTR and ham radio will not go together.

  In the ham world, there is a protocol called D-STAR, which does
  digital voice, by using a codec and then putting the bits in frames,
  perhaps relayed.  Many, including me, object to this protocol because
  it by definition includes a codec which is not openly documented and
  which cannot be impelmented, it is claimed by the proponents, without
  infringing patents.   Codec2 can be seen in part as a Free
  software/Free protocol effort to provide one of the more difficult
  parts of a digital voice system under open terms; David and others
  working on this are to be commended for what they've accomplished.

  OTR protects instant messaging, but it would be cool to have something
  OTR-like to protect digital voice; it seems intuitively obvious to the
  casual observer that the same properties of PFS and deniability would
  be equally welcome.

  The point of a codec, rather than just sending 56kbps, is to be able
  to use fewer bits to represent voice.  This may be less important on
  the internet than it is on radio, when the channel is limited.

  One could send codec output over TCP, inside XMPP.

  One could send the codec output over a UDP stream, associated with
  XMPP.


I would be interested in pointers to audio/video associated acht in
jabber.

Greg (n1dam)

-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 194 bytes
Desc: not available
URL: <http://lists.cypherpunks.ca/pipermail/otr-dev/attachments/20130215/48928fb1/attachment.pgp>