Comment by simondotau

I've no doubt the totality of the database contains a lot of photos, but only photos tagged as A1, A2, B1, or B2 would be considered illegal to possess. And then only the absolute worst of the worst (images categorised as "A1") are being included in the hash set on iOS. The category definitions are:

  A = prepubescent minor
  B = pubescent minor
  1 = sex act
  2 = "lascivious exhibition"

The categories are described in further detail (ugh) in this PDF, page 22: https://www.prosecutingattorneys.org/wp-content/uploads/Pres...