Apple to Add Manual Authentication to iMessage
Schneier on Security
NOVEMBER 22, 2023
Signal has had the ability to manually authenticate another account for years. iMessage is getting it : The feature is called Contact Key Verification, and it does just what its name says: it lets you add a manual verification step in an iMessage conversation to confirm that the other person is who their device says they are. (SMS conversations lack any reliable method for verification—sorry, green-bubble friends.
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