3 ms·
I don't think that was confusion either, because there were discussion and articles on how a hash collision is possible in the scenario you mention due to the w
by smnrchrds 5y ago
I don't think that was confusion either, because there were discussion and articles on how a hash collision is possible in the scenario you mention due to the way perceptual hashes work.
- slg 5y agoThey have said that the system won't be triggered on a single image. You would need to have multiple photos on your phone experience this hash collision which drops the odds of false positives considerably. EDIT: It has now come out that you need to trigger the system 30 times before Apple acts on it. I can't imagine the odds for someone to have 30 hash collisions.
- smnrchrds 5y agoSo they understand that their system is very susceptible to false positives, but they are saying their clients shouldn't worry because the black box hash gets compared with a black box inauditable threshold, both of which solely determined by Apple. I don't think the reaction was due to any confusion. People understood what Apple was trying to do and realized how much it sucked from a technical perspective.
- slg 5y agoWhere did "very susceptible to false positives" come from? If the odds of a collision are one in a million that is troublesome if they only need one match. If they ignore anyone that has less than 3 matches, we don't really have to worry about false positives. People who have CSAM generally don't have only 1 or 2 images.