3 ms·

One question I have on CSAM is: so it only detects known pics that law enforcement already has? If so, is that the major issue with child porn, e.g. same pics

by gedy 5y ago

One question I have on CSAM is: so it only detects known pics that law enforcement already has? If so, is that the major issue with child porn, e.g. same pics getting passed around? Just seems like this won't prevent abuse from occurring, with their own new pics and videos.

matwood 5y ago
FB, Google, MS, etc... already use a similar hash based system called PhotoDNA on any photos in their clouds. They reported ~20M+ instances last year, so yeah it seems like the same pics do get passed around. https://en.wikipedia.org/wiki/PhotoDNA https://en.wikipedia.org/wiki/PhotoDNA
pvarangot 5y ago
I'm not defending the FBI or the Apple feature here, but on a lot of cases where abusers get caught it's because they were sharing pictures of their victims in groups where they exchange other pictures with other people into that. Sometimes those other pictures are on this databases. So this database matching things generate leads. Last case I heard about was cleaning personnel in a body expression workshop for kids with learning disabilities that was sharing new pictures he took of girls in a Telegram group. The group was infiltrated by an FBI agent that allegedly got the link from a Facebook group that they found because of Facebook scanning for known hashes and reporting.
- l-albertovich 5y ago
  I can't remember the actual title of the article but I clearly remember about an instance (I think it was a few years ago) where there was a CP ring that operated (at least partly) through a whatsapp group and they got busted when they accidentally added someone with the wrong phone number so yeah, I think there's a lot of "low hanging fruit" that could lead to putting some of these assholes behind bars. This happened in argentina btw.
l-albertovich 5y ago
I don't think it would prevent "new" abuse but just like you might have some material (books, music, whatever) these people have their stuff and it's not like every single one of them is a producer but they might be part of communities and catching some of them might lead law enforcement to bigger fish and hopefully producers or at least that's how I think the people behind this might be thinking.

by gedy 5y ago

matwood 5y ago

FB, Google, MS, etc... already use a similar hash based system called PhotoDNA on any photos in their clouds. They reported ~20M+ instances last year, so yeah it seems like the same pics do get passed around. https://en.wikipedia.org/wiki/PhotoDNA https://en.wikipedia.org/wiki/PhotoDNA

pvarangot 5y ago

I'm not defending the FBI or the Apple feature here, but on a lot of cases where abusers get caught it's because they were sharing pictures of their victims in groups where they exchange other pictures with other people into that. Sometimes those other pictures are on this databases. So this database matching things generate leads. Last case I heard about was cleaning personnel in a body expression workshop for kids with learning disabilities that was sharing new pictures he took of girls in a Telegram group. The group was infiltrated by an FBI agent that allegedly got the link from a Facebook group that they found because of Facebook scanning for known hashes and reporting.

l-albertovich 5y ago
I can't remember the actual title of the article but I clearly remember about an instance (I think it was a few years ago) where there was a CP ring that operated (at least partly) through a whatsapp group and they got busted when they accidentally added someone with the wrong phone number so yeah, I think there's a lot of "low hanging fruit" that could lead to putting some of these assholes behind bars. This happened in argentina btw.

l-albertovich 5y ago

I don't think it would prevent "new" abuse but just like you might have some material (books, music, whatever) these people have their stuff and it's not like every single one of them is a producer but they might be part of communities and catching some of them might lead law enforcement to bigger fish and hopefully producers or at least that's how I think the people behind this might be thinking.