WhatsApp does use that same Signal protocol for its messages but that's very poor writing considering all the tracked metadata arguably makes it just as insecure as Telegram.
I might be missing the point, but isn’t this a decently dumbed-down description of the difference between services that are end-to-end encrypted and those that are not?
More Ukrainians should also look into the Matrix protocol as it is end to end encrypted, the service is decentralized and the company that is behind the protocol is based on the UK.
The app element is good app to get started.
Ukraine could have multiple matrix servers for everyone to use.
5 for civilians. 8 for military branches and 3 for government.
Reached for comment, a spokesperson for Telegram disputed that data is stored in plain text on the company’s servers, saying “everything stored in Telegram’s cloud is securely encrypted.” The spokesperson also said, “This kind of FUD is not surprising, coming from a minor competitor (and typical for this one). That said, we can confirm that we have neither developers, nor [servers] in Russia and we don’t see any of the mentioned risks.”