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Why Anonymized Data Isn't

Ars has a review of recent research, and a summary of the history, in the field of reidentification — identifying people from anonymized data. Paul Ohm's recent paper is an elaboration of what Ohm terms a central reality of data collection: "Data can either be useful or perfectly anonymous but never both." "...in 2000, [researcher Latanya Sweeney] showed that 87 percent of all Americans could be uniquely identified using only three bits of information: ZIP code, birthdate, and sex. ... For almost every person on earth, there is at least one fact about them stored in a computer database that an adversary could use to blackmail, discriminate against, harass, or steal the identity of him or her. I mean more than mere embarrassment or inconvenience; I mean legally cognizable harm. ... Reidentification science disrupts the privacy policy landscape by undermining the faith that we have placed in anonymization."

10 of 280 comments (clear)

  1. Paul Ohm? by Yvan256 · · Score: 4, Funny

    Paul Ohm's recent paper is an elaboration of what Ohm terms a central reality of data collection: "Data can either be useful or perfectly anonymous but never both."

    Great, another Ohm's law to learn.

  2. Only three bits? by Yvan256 · · Score: 4, Funny

    [researcher Latanya Sweeney] showed that 87 percent of all Americans could be uniquely identified using only three bits of information: ZIP code, birthdate, and sex.

    Holy hell forget about that anonymized data crap, I want to learn how she can compress that much data into three bits!

  3. Re:Duh. by ColdWetDog · · Score: 4, Funny

    I just put "No" under sex. I like to tell the truth. Not sure how it helps on the ID end though.

    --
    Faster! Faster! Faster would be better!
  4. Re:Duh. by Anonymous Coward · · Score: 4, Funny

    I put "please!" and it doesnt seem to help either.

  5. Re:Duh. by interkin3tic · · Score: 5, Funny

    Yes you are. I always put put 90210. Phone number 867-5309. If anyone tries to find me, they're at least going to have that song stuck in their head and recall with disgust the shows they watched in the early 90's. Hopefully that will demoralize them enough to give up.

  6. Re:Duh. by compro01 · · Score: 3, Funny

    I would think 90210 is a more common choice for zip code. It's probably the most densely populated area on the planet according to dataminers.

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    upon the advice of my lawyer, i have no sig at this time
  7. Re:Duh. by plague3106 · · Score: 4, Funny

    I once gave a gamestop employee my zip as 12345. He say "its ok if you don't want to give it." My reply was the no, I am from Schenectady, NY.

  8. Re:Duh. by causality · · Score: 3, Funny

    And you wonder why you never get laid when you go to a bar.

    Usually it's better to wait until you leave the bar.

    --
    It is a miracle that curiosity survives formal education. - Einstein
  9. Re:Duh. by RabidMoose · · Score: 3, Funny

    The only bar I go to is the one my parents built in their basement while I was away at college.

    I never pay for drinks, I know the password for the Wi-fi, and it never closes.

    Problem is, the only girl who ever shows up is my sister.

  10. Re:Duh. by Planesdragon · · Score: 3, Funny

    And after that, it's to keep a list of everyone who has entered the bar for the history of it's operation. Much easier to identify "troublemakers" when you have a list of people who like to have fun once in a while.

    You DO know that in many states, a bartender is legally responsible for anything you do while drunk from the moment you take a drink until you're finally sober, right?