Risks of Not Understanding a One-Way Function
New York City officials anonymized license plate data by hashing the individual plate numbers with MD5. (I know, they shouldn't have used MD5, but ignore that for a moment.) Because they didn't attach long random strings to the plate numbers -- i.e., salt -- it was trivially easy to hash all valid license plate numbers and deanonymize all the data.
Of course, this technique is not news.
Posted on June 25, 2014 at 6:36 AM • 33 Comments