Observation Over Exploitation
Students learn to see what's happening in the wireless environment around them. The app is a flashlight — it reveals what exists without forcing action. No attack tools, no offensive capabilities.
About Z.R.A.K. Education
Where real-world cybersecurity experience meets classroom teaching
The Mission
Z.R.A.K. Education exists to bring real network security skills into classrooms — for free. Not theoretical overviews or sanitized simulations, but hands-on experience with the same wireless phenomena that exist in every building, café, and public space.
Students aged 16 and older learn to observe WiFi networks, Bluetooth devices, ARP tables, DNS responses, and TLS certificates. They learn what "normal" looks like — and how to recognize when something has changed. Every exercise reinforces a core principle: observe, document, report. Never exploit.
The platform combines a free Android app with 260+ security analysis tools, 10 structured lab guides, downloadable teaching materials, and a five-book techno-thriller series that makes the concepts stick through narrative.
260+
Tools in the App
10
Lab Guides
100%
Free
The Creator
Miro Feld
An IT professional writing under the Miro Feld pseudonym, based in Polička, Czech Republic. With over 32 years in IT spanning architecture, programming, and cybersecurity, every tool in the Z.R.A.K. app, every lab scenario, and every threat described in the books comes from real-world experience.
The driving question behind all of this work: "What if this actually happened?"
That question turned into five novels, an Android security toolkit, 271 field stories, and eventually this education platform — because the scenarios in the fiction kept mapping directly to things that should be taught in schools.
Background
- 32+ years in IT — architecture, programming, cybersecurity
- Author of the Z.R.A.K. five-book techno-thriller series
- Author of Signal Lost — standalone signals-intelligence thriller
- Creator of 271 Z.R.A.K. Field Stories
- Developer of the Z.R.A.K. Android app (260+ security tools)
- Builder of this education platform — labs, resources, curriculum
- Based in Czech Republic; stories set in Prague
Teaching Philosophy
The principles that shape every resource on this site
Narrative as a Teaching Tool
Technical concepts are introduced through fiction first. When students read about Tomas detecting a fake hotspot in a Prague metro station, the lab exercise that follows has context, stakes, and meaning.
Hands-On, Not Hypothetical
Every lab uses real hardware and real wireless signals in controlled environments. Students see actual evil twins, actual ARP changes, actual rogue Bluetooth devices — not slides about them.
Competence as Responsibility
The more you can see, the more carefully you must act. Technical skill comes with ethical obligation. This principle runs through every book, every lab, and every discussion guide.
No Expertise Required
Teachers don't need a cybersecurity background. Lab guides include complete setup instructions, equipment lists, expected outcomes, and discussion prompts. The materials teach the teacher alongside the student.
Free and Open
No accounts, no paywalls, no tracking. All educational materials are free to use in classroom settings. The app collects zero data. This site runs no analytics.
Other Projects by Miro Feld
Book Writing
The Z.R.A.K. five-book series follows two Prague teenagers — Tomas and Nela — as they uncover wireless security threats across the city. From fake hotspots and poisoned café networks to surveillance devices and cross-country investigations. Each book maps to real security concepts taught in the labs.
Also: Signal Lost — a standalone thriller about a signals-intelligence specialist who detects an impossible Bluetooth pulse beneath an abandoned garage, connected to a kidnapped woman with a medical implant transmitter.
And 271 Z.R.A.K. Field Stories — short stories covering WiFi detection, counter-surveillance, RF analysis, incident response, and active defense scenarios across diverse global locations.
Z.R.A.K. Books → All Books →
Enlyzr
A personal data analysis platform for tracking activities, discovering patterns, and building logical thinking skills. Features include activity tracking, pattern discovery, and puzzle games — DualSum Sudoku and Renzoku — designed to sharpen analytical reasoning.
Available on Google Play. A different kind of project, but rooted in the same belief: tools should help people think more clearly about the information in front of them.
Want to learn more or get involved?
Whether you're a teacher, a student, or just curious about network security education.