Between the Lines

Larry Dignan, Andrew Nusca and Rachel King

Social networks: A great place to mine your alleged security questions

By | November 9, 2010, 5:27am PST

Summary: If you ever wanted to guess someone’s security questions—things like city of birth, names of pets and mother’s maiden name—just friend them on Facebook or some other social network.

If you ever wanted to guess someone’s security questions—things like city of birth, names of pets and mother’s maiden name—just friend them on Facebook or some other social network.

These answers to alleged security questions, which are used by financial institutions and other companies to confirm your identity, are coughed up daily and voluntarily.

According to a Harris Interactive survey commissioned by ID analytics:

  • More than 24 Americans 18 years or older leave social network profiles public.
  • 70 million adults share their birthplace on profiles.
  • 20 million adults reveal their pets’ names.

Meanwhile, other security question answers are presented for mining everyday.

The results of this survey aren’t all that surprising. In fact, the results largely confirm the work of Alessandro Acquisti, a professor at Carnegie Mellon. In a nutshell, Acquisti found that you can predict Social Security numbers with the information folks are presenting on social networks. The paper is worth a read and the short version of Acquisti’s research can be found in an interview on Smart Planet.

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Larry Dignan is Editor in Chief of ZDNet and SmartPlanet as well as Editorial Director of ZDNet's sister site TechRepublic.

Disclosure

Larry Dignan

Larry Dignan has nothing to disclose. He doesn’t hold investments in the technology companies he covers.

Biography

Larry Dignan

Larry Dignan is Editor in Chief of ZDNet and SmartPlanet as well as Editorial Director of ZDNet's sister site TechRepublic. He was most recently Executive Editor of News and Blogs at ZDNet. Prior to that he was executive news editor at eWeek and news editor at Baseline. He also served as the East Coast news editor and finance editor at CNET News.com. Larry has covered the technology and financial services industry since 1995, publishing articles in WallStreetWeek.com, Inter@ctive Week, The New York Times, and Financial Planning magazine. He's a graduate of the Columbia School of Journalism and the University of Delaware.

For daily updates, follow Larry on Twitter.

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RE: Social networks: A great place to mine your alleged security questions
birumut Updated - 26th Jun
Well done! Thank you very much for professional templates and community edition
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sad...
erik.soderquist Updated - 12th Nov 2010
i find it sad that security managers have not recognized that things like pet's names are very insecure, and even sadder that no one seems to care until it happens to them...

city of birth is actually a matter of public record, as is mother's maiden name, if someone is willing to do the search at the hall of records...

at the same time, because most people simply don't know enough to care, even the ones that allow you to select your own questions usually see the ordinary default questions...
Well done! Thank you very much for professional templates and community edition
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