Grow safely with crypto and AI
I'm Freddy Jeurissen. For more than 20 years I've been setting up and securing IT environments, from corporate networks to home offices. I now put that experience to work to help you keep your crypto, your data and your business safe, with a specialist's knowledge, translated into what it means for you.
How I can help
From the wallet in your pocket to the firewall in your server cabinet. Come to me for a one-off check or for ongoing support.
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Crypto and wallet security
A thorough check of your wallets, seed storage and signing habits, plus help setting up cold storage and multisig.
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AI security and privacy
Protection against AI-driven scams, and safe, responsible use of AI tools at work and at home.
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IT infrastructure and network security
Networks, servers, firewalls and Microsoft environments that run reliably and are properly secured.
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Training and workshops
Practical security awareness for teams, associations and individuals, covering crypto, AI scams and digital resilience.
How we work together
Introduction
A no-obligation talk about what you have, what you want to protect and what worries you.
Analysis
I map your situation and find the weak spots. I never ask for your passwords or seed phrase.
Advice and setup
You get a concrete plan, ordered by risk. If you like, we put it in place together.
Follow-up
Threats change fast. I keep you informed and we schedule a periodic re-check.
What you can count on
- Practical and clear
- No report full of jargon, but concrete steps you can follow yourself, in order of importance.
- Honest advice
- I tell you what you actually need. Sometimes that's a small change rather than a new product.
- Privacy first
- This website uses no cookies, trackers or third-party services. That's how I treat your data too.
From the blog
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Address poisoning: the fake address in your own transaction history
Attackers plant a near-identical address in your transaction history and hope you copy it. Here's how it works, and how to protect yourself.
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Prompt injection: why your AI assistant shouldn't be allowed everything
AI assistants that can use your email, files and browser are handy. But hidden instructions in a web page or email can make them do what an attacker wants.
Wondering what this means for you?
An introduction is free and without obligation. We discuss your situation and I tell you honestly whether and how I can help.