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Be careful here. The SMS "from" number can be spoofed. So it doesn't quite work to have a user simply reply with 'Y' to an authentication text, unless the reply
by stanleydrew 13y ago
Be careful here. The SMS "from" number can be spoofed. So it doesn't quite work to have a user simply reply with 'Y' to an authentication text, unless the reply includes something only known to the service and the user.