It’s super frustrating that this Stanford study finding CSAM on top 25 Mastodon servers doesn’t specify WHICH servers they found it on: https://doi.org/10.25740/vb515nd6874
The study recommends integrating proprietary technological tools like PhotoDNA (which would involve running all images uploaded to participating servers through Microsoft cloud services), but knowing WHERE those images were found would let moderators defederate from those servers NOW.