You could always hash the e-mails, although this would make resetting your password impossible.
How much data do Facebook's OAuth tokens contain? By looking at one, can you tell that it's linked to Pavel Lishin's account?
How much data do Facebook's OAuth tokens contain? By looking at one, can you tell that it's linked to Pavel Lishin's account?
Not really - everywhere I've gone has asked me for my email to send me my password. Same principle as with passwords: enter your email, we hash it, if it matches a hashed email in the DB, we send a 'reset' email to the address you entered.
I mean literally cutting the data sent into two pieces and each piece entering a different database server in a different country. Then, when requested, pulling both pieces and sending them to users who patch them together with client side script...?
Not to mention, latency issues would be a problem.
However, obtaining the application credentials for Instapaper would allow you to limited access to a user account on behalf of Instapaper. Since the credentials for doing this are per-application, Instapaper would likely store your Facebook id in their database. Given a Facebook id, you can easily see the account name by visiting https://graph.facebook.com/$id.