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Beyond the shouting match: what is a blockchain, really? (planet.gnu.org) 2 points by crazypython on May 24, 2021 | past GNU SIP Witch 1.0 released for peer-to-peer next gen VoIP (planet.gnu.org) 68 points by Grauwolf on May 14, 2011 | past | 11 comments GNU Free Call has been announced (Skype-like software) (planet.gnu.org) 204 points by Spakman on March 14, 2011 | past | 55 comments Secure key exchange for peer-to-peer communication and VoIP (planet.gnu.org) 11 points by Mithrandir on Nov 27, 2010 | past | 7 comments

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