Privacy

six seven

Precision: ratio of true positives to total predicted positives.

Recall: ratio of true positives to actual positives

Recall—that is, how many users were successfully deanonymized—was as high as 68 percent. Precision—meaning the rate of guesses that correctly identify the user—was up to 90 percent.

I take that to mean there is a 90% match between anonymized posts and real life profiles for 68% of users and that it’s a minimum confidence level needed for a user to be considered deanonymized.

67% made a match. 90% of matches were right.

No idea how they got that number, though.