[scbrg]

That doesn't seem to be the same kind of detectors at all.

"21.4 million of these reports were from Electronic Service Providers that report instances of apparent child sexual abuse material that they become aware of on their systems."

So those 20M seems to be images that Facebook looked at and determined to be CP. Apple's system is about comparing hashes against already known CP.

For the record: I don't support Apple's system here, but it's not the same kind of detection at all. Let's try to not make up random facts.

[detaro]

From the same thread: https://twitter.com/alexstamos/status/1424017125736280074

> The vast majority of Facebook NCMEC reports are hits for known CSAM using a couple of different perceptual fingerprints using both NCMEC's and FB's own hash banks.

[scbrg]

Ah, I see. My apologies.

[DannyBee]

Facebook looked at them after they hash matched known CP. That is how all these providers do it.

If you think that this is 20 million people mashing the report button, that is almost certainly wrong