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2.9 billion hit in one of the largest data breaches ever — full names, addresses and SSNs exposed (www.tomsguide.com)

submitted 4 months ago by [email protected] to c/[email protected]

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[–] [email protected] 7 points 4 months ago* (last edited 4 months ago) (1 children)

And not all 9-digit numbers are used, so there are fewer than a billion. It sucks when organizations store them because the search space is so small it's relatively easy to unhash them in a stolen database.

[–] [email protected] 6 points 4 months ago

A lot of businesses use the last 4 digits separately for some purposes, which means that even if it's salted, you are only getting 110,000 total options, which is trivial to run through.