[unicornporn]

How come https://riot.im (Matrix) manages to sync between devices AND have E2E, while also being federated?

That's not what you get when you have a secure system, that's what you get when you design a system that can collect (and possibly monetize) the data of millions of users.

[kiriakasis]

I believe that making sync work with E2E bring either security issues or more burden on the user; I would like them in telegram, but I also like the "if you send this message you exactly the device it go to, not an old laptop i forgot in the office, just my phone". it is meant to be secure on a device level.

[jyrkesh]

Yeah, you'd have to manually put your private keys onto your computer from your phone.

[Arathorn]

Or you do what Matrix does, and given every device its own keypair, and let users track whether they are talking to a trusted decice or not.

[dgellow]

That's not what I meant. Yes you can have sync and E2E. With different trade-offs.

Telegram is secure from device to device, not from account to account. If I send you a secure message from my iPad I don't have to worry about the web session I opened a week ago on someone else laptop.

[dgellow]

People down voting this comment, care to explain what's wrong with it?