WhatsApp paid WhisperSystems (the previous Signal company) for a commercial license. Same as Google. Dual-licensing their encryption protocol library was their main source of income back then. AFAIK, even today you can…
The open protocol variant of that is called OMEMO. Same double ratchet and implemented using Signal's library (the same as used by WhatsApp) in many XMPP clients
Well, apparently long polling is so bad on battery that Matrix clients for phones prefer to just not provide background notifications without any external push service. From what I understand, many Matrix services give…
Matrix doesn't even support server-to-client message pushing, only polling. Which means, if you want your phone to receive a message while your client is in the background, you have to use a non-Matrix protocol to…
WhatsApp paid WhisperSystems (the previous Signal company) for a commercial license. Same as Google. Dual-licensing their encryption protocol library was their main source of income back then. AFAIK, even today you can…
The open protocol variant of that is called OMEMO. Same double ratchet and implemented using Signal's library (the same as used by WhatsApp) in many XMPP clients
Well, apparently long polling is so bad on battery that Matrix clients for phones prefer to just not provide background notifications without any external push service. From what I understand, many Matrix services give…
Matrix doesn't even support server-to-client message pushing, only polling. Which means, if you want your phone to receive a message while your client is in the background, you have to use a non-Matrix protocol to…