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<div class="moz-cite-prefix">On 04/28/2014 05:41 PM, Andrew
Sutherland wrote:<br>
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Use of single-factor authentication (just a password) that is used
by both the user and all their applications is <br>
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<br>
(continuing the unfinished sentence): not great for security since
it becomes hard/difficult to tell the actual user apart from the
attacker. Specifically, this requires falling back on implicit
second-factor authentication from the account setup. This includes
things like mobile numbers (which :BenB is quite reasonably
reluctant to provide) and other email accounts.<br>
<br>
Google has done some really amazing work in terms of detecting
compromised accounts/suspicious accounts and dealing with this
situation in a way that amounts to fallback 2-factor. But it would
be better for everyone if everyone was just using two-factor up
front. It avoids problems, it helps detect problems (you know which
oauth token leaked and therefore where the security hole might be),
it makes it easier to recover from problems (don't need to change
your password on all of your devices), etc.<br>
<br>
Andrew<br>
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