Pentester · CTF player
I break web apps so they don’t break for real.
Hi, I’m Martin — online as null_byte. Penetration tester at ING. I write up the CTF challenges I solve and keep notes on everything technical in between.
$ whoami null_byte $ cat ./profile role : penetration tester @ ING certs : PT1 focus : web exploitation writeups: 27 across 17 CTFs notes : 1 $ grep -c flag ./writeups/*
27published writeups
17CTF events played
1technical notes
PT1certified
Latest writeups
all 27 writeups →Latest notes
all 1 note →CTFs played
About
I’m really passionate about cybersecurity, particularly penetration testing, and I do it for a living at ING.
Outside work I play CTFs — mostly web challenges — and write up how I solved them, the dead ends included.