Glossary of terms

The digital nature of CSAM and our fight against it involves a number of complex and technical systems, concepts and acronyms. Use our glossary to discover associated key terms.


Artificial Intelligence – intelligence demonstrated by machines, unlike the natural intelligence displayed by humans and animals, which involves consciousness and emotionality.


Application Programming Interface – an interface that defines interactions between multiple software applications or mixed hardware-software intermediaries.


The UK Home Office’s Child Abuse Image Database – The pre-eminent law enforcement collected and labeled CSAM dataset.

Vigil AI CAID Classifier

A technological system that uses state of the art computer vision to evaluate an image or video, and uses an algorithm trained in partnership with the UK’s Home Office.


California Consumer Privacy Act – a state-wide data privacy law that regulates how global businesses are allowed to handle the personal information of California residents.


Child Sexual Abuse Materials – an image or video which shows a child who is engaged in or is depicted as being engaged in explicit sexual activity.

Deep Learning

A type of machine learning based on artificial neural networks in which multiple layers of processing are used to extract progressively.


The Global Data Protection Regulation – a data privacy law that protects every EU citizen from having their personal information collected and used without their consent.

Not For Sale

A global NGO that is a leader in innovative solutions fighting human trafficking, with survivor support and alleviation programs.


A non-profit organization that operates independently of any government, typically one whose purpose is to address a social or political issue.