In 2003, Fox-IT partially acquired, an independent cryptography company within Philips. Between 2007 and 2011, Fox-IT promoted their technology in Middle Eastern countries. In 2011, Fox-IT did the investigation of the DigiNotar hack, a Dutch certificate authority that went defunct afterwards. In 2011, it sold Fox Replay Analyst to NetScout Systems. In 2015, the founders of the company sold the company to NCC Group. In 2022, it released incident responsesoftware under an open source license. In 2024, it sold their cryptographic subsidiary Fox Crypto to and renamed the company to Sentyron.