3 ms·
> And people who worked with NCMEC's database said it contains non CSAM images. Where did you see that? I tried to find more info about it, but I didn't find a
by notJim 5y ago
> And people who worked with NCMEC's database said it contains non CSAM images.
Where did you see that? I tried to find more info about it, but I didn't find anything.
- pseudalopex 5y agohttps://www.hackerfactor.com/blog/index.php?/archives/929-One-Bad-Apple.html https://www.hackerfactor.com/blog/index.php?/archives/929-On...
- notJim 5y agoI skimmed this, and don't see anything that says the DB contains non-CSAM.
- pseudalopex 5y ago"The false-positive was a fully clothed man holding a monkey -- I think it's a rhesus macaque."
- notJim 5y agoThank you. This does not support your claim, however. 1) That is an MD5 hash, not a perceptual hash. Apple is not using md5s. 2) It is a false positive, not bad info in the database. All involved acknowledge the possibility of false positives.
- pseudalopex 5y agoYou think an MD5 collision is more likely than a wrongly classified image? NCMEC generated the hashes Apple will use by running NCMEC's collection of forbidden media through Apple's algorithm. And perceptual hashes have more collisions than cryptographic hashes. Several people said the database includes non CSAM seized in investigations.[1] [1] https://news.ycombinator.com/item?id=28069844 https://news.ycombinator.com/item?id=28069844
- notJim 5y agoThanks, it sounds like you're definitely right.