On anonymity and privacy... I always thought this was an interesting fact: Birth... | Hacker News

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jmatt on March 1, 2012 | parent | context | favorite | on: About 33 bits

On anonymity and privacy... I always thought this was an interesting fact:

Birthday, Gender and Zipcode is enough to identify someone uniquely approximately 85% of the time.

And a quickly googled source but the meme is older than that: http://godplaysdice.blogspot.com/2009/12/uniquely-identifyin...

reedlaw on March 1, 2012 [–]

Really? That would imply there's only 730 people living in a given zip code (365 days in a year * 2 genders). Unless you mean birth date.

gxs on March 1, 2012 | [–]

Yes, he meant birth date.

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