Here are a few challenges I chose to write about from the preliminary for STM CTF 2018 which will take place in Ankara at Oct 31. I want to thank the STM team for a fun and smooth CTF experience. I started competing in CTFs about half a year ago and I heard good things about STM CTF 2017. I hope I can attend this year :)[Read More]
Github announced that they are being acquired by Microsoft this Monday so I decided to slowly migrate my personal projects to GitLab. It was a smooth process overall, with only a few bumps on the way.[Read More]
I participated in DKHOS alongside bloodlust (formerly yubitsec) this year but this post is not about that. While we were waiting for DKHOS to start at midnight, we decided to warm up with another CTF that was going on at the time. That CTF was Harekaze 2018.[Read More]
I wasn’t much interested in Ruby until I had a chance to work with it during my internship. It didn’t take long to pick up and I liked the idea of passing expression blocks as function parameters.
After a few months, I saw a tweet about a programming language called Crystal and I decided to check it out. Right off the bat, the code example describing the type system grabbed my attention.[Read More]
It was called “The Neverending Crypto”. I don’t remember what difficulty level it was listed at, probably the lowest :) Here is how it went.
You are presented with an address and a port number. When you connect, you are asked to enter a string. The string you entered is encrypted and sent back to you. After a few tries, I realize it’s encrypted with a Caesar cipher.[Read More]
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