Changes
evening the general tone - update with RedPhone having been replaced by Signal also on Android
|Scenario Task Description=There is not much choice for having a private (encrypted) conversation using the cellular network. The [http://www.cryptophone.de/ CryptoPhone] might be one of the few commercially available solutions, but both parties will need to have one for secure calls.
Android and iPhone users can rely on various software titles tools that use a secure Voice over IP protocol or a VPN approach to encrypting your calls. You will need a steady data (Internet) connection and the same application for all conversing parties. Note that by "private - " we mean conversations which are not accessible to anyone but the conversing parties.
Android:
* [https://www.linphone.org/ LinPhone]
* [https://ostel.co Ostel] , using the CSIP simple client - ''no updates since November 2014''* [https://ssd.eff.org/en/module/how-use-redphone-android RedPhone] - ''no updates since September 2014'' iPhone:* [https://ssd.eff.org/en/module/how-use-signal-%E2%80%93-private-messenger Signal]
Multi-platform
* Signal for [https://ssd.eff.org/en/module/how-use-signal-%E2%80%93-private-messenger iPhone] and [https://ssd.eff.org/en/module/how-use-signal-android Android]
*[http://www.bleep.pm Bleep] messenger enables encrypted calls over the peer-to-peer Bittorrent protocol
*[https://www.silentcircle.com/products-and-solutions/software/ SilentPhone] commercial solution from SilentCircle
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