Common reasons for landing on this page are: the cyph URL has been opened more than once (only the first person who clicks it is allowed into the chat) or the cyph link has already expired.
Native chat applications for Android and iOS are in the works. We have no plans to support any Texas Instruments machines.
The Cyph beta is free to use for individuals (we intend to always have a free tier, because we see online privacy as a basic right) and we are currently piloting enterprise deployments of secure video and instant messaging.
Currently, we only track numbers of: cyph sessions, messages, timeouts, voice/video calls, file transfers, signups, cyphertext UI views, help UI views, and calls to our API.
Click the plus ("+") icon in the message composition textbox, then click the video (or phone) icon. A warning will pop up confirming that you wish to send the call invite and that connecting will expose your IP (Cyph video uses a peer-to-peer connection for voice and video, so you will be connecting directly to the other party instead of going through our servers).
Simply go to cyph.im or click the "start new cyph" button and a cyph link will be generated for you to send to a friend. Text, email, or send the link to them via any other channel, and when they click it you both will enter a secure chat.
Click the plus ("+") icon in the message composition textbox, click the paperclip icon, and then select the file you wish to share.