EmojiBrowser Writeup
2021-09-19
EmojiBrowser was a path traversal challenge themed after emoji, because everyone totally loved the emoji challenges from last year.
Hello, I'm Jeffrey.
I’m a computer scientist at the University of Central Florida who is passionate about information security.
Use PGP? My public key can be found here.
Projects
KnightRider
Learn More...A mobile game themed after The War on I-4, written in vanilla JavaScript and Python (FastAPI), with a leaderboard and SMS notifications via Twilio. Won "Best Use of CockroachDB" at Hackabull 2021.
SunshineCTF
Learn More...On top of helping prepare for the CTF, I authored two challenges, one on password security and another on iOS device enrollment, as well as writing the year’s custom CTFd theme.
VoteyMcVote.space
Learn More...A Flask (Python3) application for experimenting with different voting systems written for KnightHacks 2020. Uses WebSockets for client-server communications. UI was runner-up for best design.
Pinstripe
Learn More...A simple web server, written in Python3, that generates icons on-the-fly with Pillow (PIL) designed to be used to differentiate university classes.
Grade management utilities
Learn More...I have written two grade monitoring utilities, one using Selenium + Python and the other using the Canvas LMS API + NodeJS, to check my grades using an easy-to-access widget. Private for the time being.
This list is not comprehensive! I also develop tools that push the boundaries of iOS under a pen name. Feel free to reach out for a copy of my résumé here.
Also feel free to check out my Shakespearian insult generator and my CIDR calculator.
Drone Photography
I also do drone photography with my DJI Mavic Pro, often releasing my works under a copyleft license. I take footage of landscapes and my alma mater’s football games.
Please contact me for said photos.
Posts
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DownUnder Writeup
2021-09-19
This challenge is designed to be an introduction to GBA reverse engineering and an exploration of emulation tools. Text is printed off-screen, which the player must view by using tools built into emualtors like mGBA.
TSATechie Writeup
2020-11-11
This is a multiple-part challenge, most of it which is done offline. The challenge is structured into three main components:
- Hand-crafting a serial number based on given information
- Using the newly-created serial number to generate an iPhone’s UDID
- Using this UDID, on top of the given iPhone model, to fake a response from a device enrollment challenge