[Story] ER-212: Show room encryption state in the composer

[mxandreas]

Description

The main goal of this is to mitigate the potential attacks on "downgrading" room encryption via cloning/spoofing of rooms as captured on https://github.com/matrix-org/internal-config/issues/1606.

It should be clear for the user if the room is E2EE when sending the message. Currently there is some indication on EW (a legacy shield and placeholder text of the composer) but nothing on EX, making it slightly less urgent for EW.

Designs are available here for all platforms (this story only concerns the decoration in the composer, potential decoration in other areas should be ignored). Illustration on iOS:

Acceptance criteria

• Composer shows room encryption state in/at the composer

Out of scope

• Nothing

Open questions

Sign-off

Android

• Design sign-off on completion
• QA sign-off on completion
• Product sign-off on completion

iOS

• Design sign-off on completion
• QA sign-off on completion
• Product sign-off on completion

[manuroe]

@stefanceriu @jmartinesp This is a bit close to the encryption decoration work you are doing. Can you update the composer hint and its icon?

[bmarty]

Note a product owner, but I think we should not bother users about encryption/technical terms ("invisible crypto", etc.) so maybe stick to Message... for the hint and showing the padlock for e2e rooms is enough? Or using another term like "Secure message..." ? It will match what is used on the PlayStore: Element X - Secure Chat & Call.

[mxandreas]

maybe stick to Message... for the hint and showing the padlock for e2e rooms is enough? Or using another term like "Secure message..." ? It will match what is used on the PlayStore: Element X - Secure Chat & Call.

Encryption is not a "technical term" in our context, we already use it in other places of the UI (e.g. Encryption menu, Encrypted pill in room info), and even in marketing materials since E2EE is one of our key differentiators. Therefore "Encrypted message" should be very clear and unambiguous.