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kenrikm
on Feb 3, 2014
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Paper – stories from Facebook on the App Store
Best guess is they use "identifierForVendor" mixed and some other verifications to log it in. Might be worth looking into, security bugs are fun to find.
mmasashi
on Feb 3, 2014
[–]
It seems you are right. Paper recognized my account even without iOS native Facebook login.
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