Data.

The charity warns organised criminals are taking advantage of “systemic failures” in online security infrastructure.

Commercial websites host a wide range of child sexual abuse imagery which is available for users to buy. The imagery for sale can involve victims of all ages, and can include some of the most severe and extreme forms of sexual abuse.

Some of these sites have been deliberately disguised to appear as non-criminal sites or to look inactive in an attempt to operate on the open web while avoiding detection. Many of these sites accept payment via cryptocurrencies, card payments or money transfer services.