@signalapp When a website uses Signal as an SMS substitute:
1) Is the message downgraded to SMS if the user doesn't have Signal?
2) Is the website notified if the user's safety number changes? (e.g. So the site knows something is up and can stop sending messages to that number.)
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Unfortunately, I can't find any. I am looking to use Signal on a new website and want to find out if the website would be notified of a Safety Number change (for example) to protect against SIM swap or number porting attacks.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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