About us
Since September 4, 2025, Fox Crypto has been renamed Sentyron.
For over 20 years, Sentyron has been the leading provider of cryptographic solutions for the Dutch government. As a European company, we focus on providing secure communications solutions for Government, Defence and critical infrastructure.
Our expertise is in protecting state secrets, classified information and other types of sensitive information. Keeping data safe and reliable for threats of today, and tomorrow. We protect what really matters.
Since 2025, Sentyron has been part of CR Group, a European group of trusted technology companies in secure communications and cyber security. Founded in 2022, CR Group brings together companies that protect the critical functions of society, working for governments, defence organisations and operators of critical infrastructure across Europe.
Within the group, we work alongside Tutus and contribute our deep expertise in secure communications. Our customers keep what they know from Sentyron: Dutch craftsmanship, close collaboration and solutions built to protect their most sensitive information. Now backed by the scale and strength of a European group.
Together, we share one ambition: a sovereign and resilient Europe, built on technology people can trust.
Tech for trust.
Learn more about CR Group at www.cr.se
Sentyron is proud to have built long-lasting, strategic partnerships with, among others, the Dutch Ministry of Defence since 2018. We contribute to the development and enduring availability of cryptographic products. Operating in specially secured spaces, we implement rigorous measures for technology, personnel, and methodologies.
We create, and manage cryptographic products. Our products include media and file encryption, network security, domain separation, secure mobile communication, and encryption key management. Our solutions earned the trust of partners across various layers of the Dutch government.
We deliver technology at the highest certification levels (EAL7+, NATO Top Secret, NL-NCSA). For organizations where failure is not an option, our solutions ensure that critical information and processes stay secure under all circumstances.
Founded in Delft and firmly rooted in Europe, we build sovereign high assurance security solutions. This strengthens digital sovereignty and provides trusted European alternatives for governments and vital organizations.
Security challenges evolve daily. We continuously invest in post-quantum cryptography, cloud security and AI, anticipating tomorrow’s threats and keeping our solutions ready for the future.
Safeguard critical information with guaranteed one-way real-time data transfers at 1–10Gbps. Easy maintenance, low total cost of ownership, and certified to CC EAL7+ and NATO TOP SECRET.
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Guaranteed one-way data transfers at 1Gbps. Easy maintenance, low TCO, and certified to CC EAL7+ & NATO TOP SECRET. Powered by our proven Sentyron DataDiode, ANDEAN 1G delivers the most secure solution for critical environments in just 1U rackspace.
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Handling highly sensitive information requires communication that meets the highest security standards. Our certified mobile solution keeps your data secure.
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With our Electronic Key Management System (EKMS), organizations securely and flexibly manage and distribute cryptographic keys.
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Connection security is essential to protect classified information. Public organizations are prone to espionage, manipulation of data, and other cyber crimes.
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SINA is a network encryption solution that secures data as it travels across networks using IPsec. It is available in various models, offering either software or hardware-based encryption.
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ClientPortal enables secure and controlled file exchanges, even for large files. Being a web-based application, it can be accessed by anyone with a web browser and an internet connection.
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OpenVPN is a versatile, open-source software solution that creates a secure VPN connection between a client and a server over the internet. OpenVPN-NL is a fortified version of OpenVPN, specifically tailored for The Netherlands.
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Integrity and quality are paramount to us. Non-integral conduct is not accepted within Sentyron; we operate according to various quality standards and hold extensive certifications, like Common Criteria for Information Technology Security Evaluation (CC), NATO COSMIC TOP SECRET, NITES and Zulassungsstelle BSI.
