In a previous blog we looked at binary hashes. Now we look at PhotoDNA, a different type of hashing technology that calculates hash values based on the visual content of an image.

In this series of blogs, we discuss tools that aid investigators and online service providers, Unlike the tools we have previously covered, AI has the potential to identify new and previously unclassified child sexual abuse material. 

Find out what hashing is, and how this technology, which is frequently used by forensic investigators, is vital to the fight against child sexual abuse crime.

In our series on the Technical Model National Response and technologies that are used to find online child sexual abuse material, we now look at web crawlers and how they can be built to look for this illegal material.

We’re running a series of blog posts that look at some of the technologies available to tackle child sexual abuse material. First out is blocking.