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A comment on Authy (YC W12) launches two-factor auth as a service. Parent comment

Re:Authy (YC W12) launches two-factor auth as a service by michaelmior on Thursday August 02, 2012 @02:43PM (#4330273)
Give your phone number once to Authy and then to every app that wants to use Authy.
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Re:Authy (YC W12) launches two-factor auth as a service by gliese1337 on Thursday August 02, 2012 @04:43PM (#4330888)
Why? If that's necessary, Authy is doing it wrong. A client app ought to be able to request an auth token that Authy sends to the user without ever having to reveal the user's number to the client app.
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