New in v4.4 (Testflight Beta):
- disappearing messages (with mutual agreement)!
- live messages – they update for all recipients as you type them.
- connection security code verification, for contacts and group members – protect from MITM attacks.
- send animated images and “stickers” (e.g., from GIF and PNG files and 3rd party keyboards)
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my feeling is that it is reasonable to have the sender of the message set the terms here
This is fundamentally impossible thanks to the analog loophole. The receiver can always copy down the message to a notepad, or just remember it. Exposing this mutual agreement is staying honest and make sure that it is understood by everyone involved.
It is important to remember that disappearing messages (in any application) are only helpful for people who you trust currently. (And until the messages are deleted.)
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