Hey! My name’s Jason, and I go by the handle enscribe/jktrn on pretty much every account. I do a lot of things to find fulfillment — I enjoy cybersecurity capture-the-flag competitions, rhythm games, beautiful READMEs, gluttony, web development and Tetris. You’ll mainly find CTF writeups around here, which I’ve poured lots of love into. Thanks for stopping by! (・ω・)ノ
reverse> SekaiCTF 2023:
A Hackable Unity Implementation of Project Sekai's Gacha System
I created a fully functional, hackable replica of Project Sekai's gacha system for SekaiCTF 2023. This was my design process.
ppc> AmateursCTF 2023:
Chinese Remainder Theorem, Carnival Games and 2048-bit Integers
An eccentric story about Bob, Chinese Remainder Theorem and the guessing of 2048-bit integers with only a GCD leak.
osint> WolvCTF 2023:
Hunting Down a Flag-Stealing Ransomware Group with OSINT
Hunting down a flag-stealing ransomware group with the power of OSINT — from Ethereum breadcrumbs to TF2 workshop maps.
ppc> MHSCTF 2023:
Edmonds’ Blossom Algorithm for Maximum Weighted Matching
Utilizing Edmonds' beautifully crafted "Blossom algorithm" alongside graph theory to maximize weighted matchings.
osint> idekCTF 2022:
“No Moving, Panning, or Zooming”, a GeoGuessr-style OSINT Challenge
"No moving, panning, or zooming" — a GeoGuessr-esque OSINT challenge testing geographical literacy.
forensics> SekaiCTF 2022:
Forensics Writeup Compilation
An organizer-written writeup compilation for selected forensics challenges from the SekaiCTF 2022 capture-the-flag competition.
ppc> Hacky Holidays 2022:
“Port Authority”, a WebSocket Strategy Game
A programming challenge involving micromanagement of JSON-controlled ships within a WebSocket-based strategy game.
compilation> PicoCTF 2022:
Beginner's Writeup Compilation
A compilation of in-depth, comprehensive writeups for selected introductory challenges from PicoCTF 2022.