This is a no-win pincer movement for consumer. Withhold phone #, no 2-factor, get hacked. Provide it, get exposed.https://twitter.com/zeynep/status/770364893677621252 …
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But then you need to write down those codes and carry them with you, unprotected by phone pin.
The people I try to get to adopt 2FA need the second factor to be protected against easy seizure.
not one time codes, but google authenticator style. SMS for 2FA is a poor choice against seizure.
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