silent circle is closed source and everything goes through their server. Sure they can claim not to store much logs, but when some government entity puts some s

silent circle is closed source and everything goes through their server. Sure they can claim not to store much logs, but when some government entity puts some secret orders on them, who knows what will happen. Remember that having the metadata, who calls who, is already a big win for surveillance entities. RedPhone is owned by twitter, same story, but the client is open source, and maybe they have plans to release the server too, but you would have to compile your clients too since apparently the servers are hardcoded into the client. Both of these are thus not federated. Ostel is open source client and server side, you can easily set up your own server, and if I understand it correctly it's also federated. Some reading: https://github.com/WhisperSystems/RedPhone/issues/63 https://github.com/WhisperSystems/RedPhone/issues/63 https://guardianproject.info/2012/07/05/a-network-analysis-of-encrypted-voice-over-ostn/ https://guardianproject.info/2012/07/05/a-network-analysis-o...