See below the schedule for an extended write-up of each workshop.

Workshops Friday 16th of February
Time Workshop Location Workshop Leader
16:00 Impressioning Workshop 1 Workshop Room Jan-Willem Markus
On request 1 on 1 evaluation of your slicer settings (paid advice) Workshop Room Russel Gulman
Evening What the Helmet (starting session) Workshop Room Moem
Saturday 17th of February
Time Workshop Location Workshop Leader
10:30 Introduction to LoRa 1 (max. 10 ppl) Workshop Room Thomas Renes / Niels Ardts
12:00 Introduction to LoRa 2 (max 10 ppl) Workshop Room Thomas Renes / Niels Ardts
13:30 Beginner’s Method for solving a Rubik’s Cube (max 25 ppl) Workshop Room Ritger
16:00 Impressioning Workshop 2 Workshop Room Jan-Willem Markus
Morning/Afternoon Session Blacksmith Workshop (SparkShack @ HackerHotel) Outside (parking lot) Gori
On request 1 on 1 evaluation of your slicer settings (paid advice) Workshop Room Russel Gulman
Evening Reallife Mariokart Workshop Room Dustin Snijders
Workshops Sunday 18th of February
Timetable Workshop Location Workshop Leader
Morning Session Blacksmith Workshop (SparkShack @ HackerHotel) Outside (parking lot) Gori
12:00 What the Helmet (finishing) Workshop Room Moem
14:00 Impressioning Workshop 3 Workshop Room Jan-Willem Markus
16:00 From SQL Injection to Root Workshop Room Patrick de Brouwer
On request 1 on 1 evaluation of your slicer settings (paid advice) Workshop Room Russel Gulman


Beginner’s Method for solving a Rubik’s Cube – Ritger

With 350 million puzzles sold, practically everyone has at one point in their life either played with or owned a Rubik’s Cube. Invented in 1974 by Hungarian mathematician Ernő Rubik, the puzzle has over 43 quintillion unique combinations. The popularity of the Rubik’s Cube really took off in the 80s and is still one of the most popular puzzles to date.

This workshop teaches the Beginner’s Method for solving a Rubik’s Cube. The Beginner’s Method requires more turns than other ways of solving a Cube but is a lot easier to get started with and memorize.

When deciding whether this workshop is for you, keep the following in mind:

– Are you not satisfied with the amount of noise made by your fidget spinner? Try a Rubik’s Cube!
– Do you have the spatial awareness of a drunk monkey (or better)? You may like a Rubik’s Cube!
– Is there absolutely nothing else to do? Come solve a Rubik’s Cube!
– Do you want to be able to show off your intellectual prowess by solving a puzzle made for an eight-year-old? Let’s do it!
– Would you like to relax by taking some time for yourself in a room with 20 strangers and solving a cool puzzle? This is it!
– Are you looking for things to throw at people’s heads? Please find something else, as there are only 25 cubes available…

This workshop houses 20 participants (or more, if you’re quiet). Cubes and instructions are provided and someone is on-hand to provide you with some help if you need it.

So come relive how it was to be a kid in the 80s and revel in the glory that is the Rubik’s Cube.

This workshop is organized by ritger, a member of Hack42, the Arnhem (NL) based hackerspace.

Blacksmith Workshop (SparkShack @ HackerHotel) – Gori

Blacksmiths are the original proto-hackers: makers of tools and machines, enablers of civilization. The craft has been around for at least 7000 years, and it is still going strong. This year at hacker hotel, you will have the chance to try it out for yourself! SparkShack, the metal workshop located at RevSpace in The Hague will be present, with an array of materials and tools, providing demonstrations and workshops on steel forging and aluminium casting. If there is interest and we all feel like it, we wil do more advanced things, like pattern-welding steel to make damascus, etching and staining steel, forging aluminium or casting copper and bronze.

The following activities are planned :

  • Forging and casting demos! Times will be announced at the event.
  • Ask Gori for a introduction to forging workshop. It takes about 1 hour, two persons max. Times are random and flexible
  • Have your custom 3D printed design cast in metal! Contact beforehand if you want to do this.
  • Come and play with us anytime the workshop is open!

Most important thing is that if you want to play at the SparkShack, please bring protective clothing. Red hot steel and molten aluminum are very dangerous and can seriously hurt you!
This means :

  • Closed leather shoes
  • Safety overall or jeans and thick cotton shirt
  • Safety glasses
  • Leather gloves
  • Ear protection

Absolutely no synthetic clothing! Synthetics can catch fire and will melt onto your skin!

SparkShack @ HackerHotel is organized by Gori, a scientist and dad by day, hacker and blacksmith at night.

“Introduction to LoRa” workshop
(2 workshops – Saturday Morning)
Thomas Renes – Niels Ardts

This workshop will give an introduction to LoRa.
It starts off with a small presentation what LoRa is, how it works and what it can be used for.
There are a few Arduino boards available with Built-in LoRa chips which the participants can use. The participants can try to send sensor data over the LoRa network to the op The Things Network. We want to make people interested in LoRa, so our target group is people that haven’t done anything with LoRa before.

Participants to this workshop must bring their own laptop, we bring the LoRa gateway for LoRa coverage. We have 10 Arduino boards with builtin LoRa chips, so we can host 10 people per workshop. Each workshop lasts 1,5 hours. There will be a list to subscribe to this workshop.

Workshop1: 10.00-11.30 Saturday 17th of February

Workshop2: 12.00-13.30 Saturday 17th of February

To prepare yourself, here’s the Wiki page to have a nice read:

The workshop leaders:

As Lead Cloud Architect Niels Ardts is responsible for the entire infrastructure of Intermax. He makes sure our infrastructure is working 24/7, without any trouble or interruptions. Also, he ensures that our infrastructure continuously meets our needs. Last but not least, Niels is essential for the constant flow of innovation within our company, always trying to figure out ways in which IT can make our work easier.

Thomas Renes works as a Security Engineer for Guardian360, where he works on making the internet a safer place. As a cyber security-specialist his daily life revolves around finding vulnerabilities in code and machines and making sure that these vulnerabilities cannot be used by malicious individuals. Thomas is also interested in the internet of things and home automation, especially in combination with security.

WhatTheHelmet (Safety Helmet Pimping Workshop) – Moem

Life in general, and hacking in particular, can be dangerous! Protect
yourself from falling objects, flying drones and gamma rays… but do it
in style. Come and join us to create one of these ultimately cool and
geeky helmets. Whatever comes at you, you’ll be able to think ‘What the
hell, I’m protected.’

Your finished WhatTheHelmet will look like pewter, rusty iron, bronze or
copper. It can have your name or other adornments. If you want, you can
add LEDs or other electronics (bring them!) Above all, it will be one of
a kind and it can still be worn.

Participating in this workhop costs €5, which covers the materials
(including the helmet). Because of drying times, we do most of the work
on Friday, then finish it up on Sunday.

Impressioning Workshop – Jan Willem Markus

Impressioning is the art of filing a key to a unknown lock. Impressioning is closely related to lockpicking where the goal is to open the lock. With impressioning you can save your progress half way and have a working key in the end.

How does it work? By inserting a brass key blank (uncut key) into the lock and apply rotational force and up/down movement you damage the key (and lock) slightly. The damage to the key is useful as these are the places where the pins are binding in the lock and we can file these binding pin positions down.

After repeating these steps, we’ll have a working key. This usually takes between 15 to 30 minutes with practice. The participants will need about an 30 to 60 minutes to create a working key. By ‘cheating’ we can increase the chance of success, and lower the time needed.

We impression on Abus C83 locks as this is the lock I practice on. This lock is used in the European impressioning championships. I’ve got all the materials for this workshop, and can teach 5 people at once. Even more when tools are shared. No further equipment is required.

In preparation I suggest watching one of Jos Weyers’s talks on Impressioning (

About Jan Willem:

My name is Jan-Willem Markus (@jwrm22), I’m an electronics engineer by trade. I’m always in for a challenge. I found my way in to the hacker community by BEEA ( and SHA2017. I’m a member of Toool and BitLair.

This is a chance for me to improve upon my teaching skills and make impressioning more popular. I’ll bring my lockpicks with me too, and some stupid easy locks.

From SQL Injection to Root – Patrick de Brouwer

In this workshop, Patrick will take you on a journey through the practical side of Ethical Hacking. The workshop will start by identifying a SQL Injection vulnerability and exploiting this vulnerability to discover information within a database.

After accessing the database and extracting data such as usernames and passwords, you will examine several steps necessary to place data on the web server including a shell script to gain access to the server’s command-line interface. The ultimate goal is to gain root access to the server by using a privilege escalation exploit.

About Patrick de Brouwer:

Patrick is an Ethical Hacker who specializes on the practical, offensive side of hacking. Patrick is currently working as a Security Consultant and often teaches classes related to Ethical Hacking and is a regular speaker on security events.




Give a workshop!

Participants of Hacker Hotel give lectures and workshops in all kinds of disciplines and levels.

There is more than enough space to give your prepared or unprepared workshops.
We have 10 different rooms, varying from secret lairs to big presentation rooms.
Giving a workshop, whatever the skill level, is greatly appreciated. Contact us!