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why does an FBI agent have 12 million+ identification numbers for iOS devices?



This is the stated reason for the release - to have people ask why an agent has 12m UDID numbers on his laptop. They released 1m out of the 12m UDIDs so that they can guarantee a statistical sample that can be verified, while preserving a bit of privacy.

Along with the UDIDs were other columns with an assortment of personal data, although there were a lot of holes.

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How large would a 12m line long .csv file be?

Not sure how many bytes per entry, but it would be of the order of gigabytes.

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It would probably compress well

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The 1,000,001 line file is 136MBs uncompressed, so 12M should be around 1.6GB

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It might be a gigabyte if there were about 90 characters per line 1 or 2 gigabytes tops? "on the order of gigabytes" is a rather pretentious way of saying that.

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The filename refers to NCFTA, which might seem in context to be http://www.ncfta.net — perhaps some bit of intel that's widely-traded in NCFTA circles for various uses? I mean, hey, pretty useful if you're tracking down pretty much anything in which an Apple device is used, right?

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Perhaps Apple (or someone) is having them do an investigation:

http://www.forbes.com/sites/kashmirhill/2012/04/26/the-fbi-w...

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exactly

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