About the HCS

The Hash Check Service is an initiative of the European Commission, executed by Offlimits. This tool allows users to scan their data for known Child Sexual Abuse Material (CSAM).

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The Hash Check Service

The fight against online sexual abuse of minors is one of the greatest challenges of this century. Illegally shared images and videos can circulate on the Internet for years, meaning that victims are continuously being re-victimised.

The Hash Check Service allows customers to scan their data for hashes of files that occur in connected databases of known Child Sexual Abuse Material (CSAM). This unique tool, provided through an HTTP based API, contains validated hash lists of multiple trusted sources, among which is The Dutch National Police.

The service is privacy friendly, easy to use and free of charge for most applications, including hosting providers and internet service providers. The Hash Check Service simplifies the management of online content and contributes towards a safer Internet for all.

About Offlimits

Offlimits knows the digital world like no other. We are familiar with both the technical possibilities and the social opportunities. We are aware of possible threats when the freedom of the internet is at stake. Therefore, we continuously seek for the balance between freedom and limitations.

Offlimits consists of the Dutch Hotline, Helpwanted and Stop it Now. We aim to eliminate online transgressive behaviour through prevention. We help victims of online transgressive behaviour and we make sure that illegal content is removed from the Internet as soon as possible.

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