[BinaryIdiot]

Interesting. I had not known about that service and it's cool that it's free (though I'm not sure if it's always free; it says to qualified applicants).

I am curious how one goes about developing a service like this without having to see child porn itself. Is there a database somewhere with known hashes? I'm assuming there would have to be along with a way to generate hashes yourself so you could test as I couldn't imagine running automated unit testing with real child porn.

[Elepsis]

AFAIK the database of hashes is maintained by the National Center for Missing and Exploited Children, who unfortunately do have to deal with the disheartening task of viewing some of that stuff.

[zamalek]

I was going to suggest a convolutional NN, but you'd need to go through the gruelling task of creating the training corpus.