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[liberationtech] Open Secure Telephony Network (OSTN)

Jacob Appelbaum jacob at
Sun Jul 15 06:44:32 PDT 2012

> Found this in HOPE 9 schedule:
> This service is a public testbed of the Open Secure Telephony Network
> (OSTN) project, with the goal of promoting the use of free, open
> protocols, standards and software, to power end-to-end secure voice
> communications on mobile devices, as well as with desktop computers.
> This service is in public beta. Calls placed throug the system are
> encrypted and authenticated between peers. It is continually being
> tested and improved to ensure the best possible security. Logging is
> minimal and work is being done to ensure no unecessary IP addresses are
> stored on disk.
> Again: Is the source public? Have there been reviews/audits? Jake? :)

Heya ilf,

The source is public - I don't know of anyone who has reviewed the top
to bottom stack. Nathan and his team are generally quite clueful, so I
think it has a good chance of being quite reasonable. I have used it and
recently I was talking with the lead developer, Lee, in Brazil about how
to improve the bootstrapping of identifiers (number, login, etc) process.

I think there is a lot of possibility with OSTN.

All the best,

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