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.
What does 67% at 90% precision mean
Precision: ratio of true positives to total predicted positives.
Recall: ratio of true positives to actual positives
67% made a match. 90% of matches were right.
No idea how they got that number, though.
six seven
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.