How does 'Trust this computer' work in Google's 2 step authentication?

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I have seen this option 'Trust this computer' feature in Google and some other famous sites. How does this work?

What information about my computer is being stored in their server? Or is it based on cookie -- in that case, if I delete cookies will it stop working?

Please share if you have any information about its inner working. Thanks.

phoenix

Posted 2013-11-27T11:15:59.147

Reputation: 125

Actually, I think they're doing something extra. When I go to Google Accounts to see the devices I've said they can trust, they list my machine name ie "Andrew's iPhone". How do they get that? I didn't know you could via Javascript or anything else for that matter! – Turgs – 2015-01-23T12:59:44.960

1As the first result I get by googling for google "trust this computer" contains the answer for how they do it (in Google's support site), I'd say your question lacks research effort... – zagrimsan – 2013-11-27T12:13:24.597

My bad. Cookies it is! – phoenix – 2013-11-27T12:28:06.007

Answers

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Cookies yeah! If you delete them, you gotta login again!

tim

Posted 2013-11-27T11:15:59.147

Reputation: 302