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RE: 2 Factor Authentication w/ Encrypted Backup and Device Sync - Bye Bye Google Authenticator

in #security7 years ago

If sms is used as second factor, someone can call your mobile company and pretend to need a copy of the sim and they will sometimes get it. At that point they can get all your sms messages.

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Yes that is right. Social Engeneering is an often used attack vector.
But I don’t think Authy can be restored only with sms. If this is so there is no need for Authy at all.