Kees Leune

@[email protected]
310 Followers
137 Following
19 Posts
Chair/Associate professor and CISO at @adelphimathcs. Defensive cybersecurity. CLI not GUI. Increasingly infrequent blogger. Amateur radio operator W2CJL.
🇳🇱 🇺🇸
webhttps://leune.org
Kees LeuneMar 12

Essential Computer Science Lore

Watching a class of undergrad CS students work on a midterm exam for a C programming course was a good motivator to start putting together this list of “Essential CS Lore”. I believe that any CS student or practitioner (or adjacent), as well as anyone interested in the discipline should have detailed knowledge of all of these!

https://leune.org/2026/03/11/CS-Lore/

Essential Computer Science Lore · Kees Leune

Kees LeuneJan 4

This was a fun project for winter break!

See https://eater.net/8bit for a full description!

Kees LeuneDec 31
Is there still a role for academic research in cyber security?
Kees LeuneNov 30, 2024
The last little bits of work on a brand new mini ctf for my students. Nothing like some hands on fun to close out the semester! 10 trivia questions and 10 small hands on challenges. Write up of solutions is 40% of the deliverable!
Kees LeuneNov 24, 2024

So far not much traction on this one, so I guess I'll have to start putting together some stuff myself. Initial ideas:

scan a network and discover live IP addresses
- Include non-ping hosts

  • perform a port scan of the live IP addresses to find services
    • Include non-top-1000 ports
  • Intercept and analyze network traffic
    • pcap containing password.
    • pcap containing encrypted content
  • Write IDS rules to intercept traffic
  • Intercept https traffic and analyze certificate

I would like this to take about 2.5 hours to complete start-till-end. Any other suggestions that could be fun/educational? https://infosec.exchange/@leune/113533043640101685

Kees Leune (@[email protected])

I am looking for suggestions to have sophomore college students (CS majors) play a CTF focused primarily on network/cloud security. Does anything like that exists, or am I going to have to build this myself?

Infosec Exchange
Kees LeuneNov 24, 2024
Did you know that number stations are still somewhat alive on shortwave radio? Check out https://priyom.org for schedules and then head over to http://kiwisdr.com/public/ to tune in to one and see if you can listen in! #numberstations #oddities #hamradio
Main Page › Priyom.org

Kees LeuneNov 23, 2024
I am looking for suggestions to have sophomore college students (CS majors) play a CTF focused primarily on network/cloud security. Does anything like that exists, or am I going to have to build this myself?
Kees LeuneNov 11, 2024
I really do work at a beautiful campus
Kees LeuneNov 5, 2024
That is disappointing. Setting up and connecting the HF antenna system for the first time in months and finding that all bands measure an SWR of four or higher. Workable with a tuner, but far from ideal. Time to break out measuring equipment to figure out where the issue is. #hamradio #amateurradio
Kees LeuneOct 22, 2024
One of these days, employers will figure out that the only skill worth hiring for is the ability to learn and adapt