[pampa]

e2e does not prohibit it. But makes it hard or impossible even for an advanced user (i tried moving my whatsapp data from iphone to android once, not sure of the current status with signal).

Telegram is all about convenience, security is just bolt on. Everybody says they care about security, but hardly any TG user does it, because it is inconvenient. Install it on any any new device, confirm your phone number with an sms and whoops, all your chats and drunk and stoned pics are back.

[Jtsummers]

If messaging clients like WhatsApp permitted a Keybase styled authentication of additional devices, then migration (so long as the original were available) wouldn't be difficult at all. And if they permitted backup to a user selected service (for instance, Google's for Android versus Apple's for iOS) then migration across OSes would become simplified for users.

But the WhatsApp iOS client backs up to iCloud, and the Android client backs up to Google, and this creates a blocking issue unless the user is willing to jump through hoops and use 3rd party tools.

[snvzz]

Matrix actually does authenticate additional devices, and handle all that.

It's already out there, just a matter of adopting it.

[kitkat_new]

This just is not true. The fact that you are writing this, clearly shows you don't know of Element/Matrix.

When you use Matrix, and open a web client, the only thing you have to do is 1) logging in and 2) providing a password, key file, scan a QR code, OR compare Emojis - and you get everything synced.

The same holds for any type of client. I barely see a loss of convenience, let a lone something being hard or impossible.

[pampa]

You are right, I never used Matrix. I guess i have to check it out. Missed it. Usable client apps for martix are what, 1.5 years old?

Signal seems to have been around for ages. OTP even longer

[kitkat_new]

> Usable client apps for martix are what, 1.5 years old?

Older, Element (also known as Riot and Vector) should already have been existing for at least 5 years.