When using a microcontroller in a custom design, there’s always a bit of a headache for me because I need to figure out a convenient way break stuff out for programming and development. Usually you can’t afford to get the...

For the past couple years, I’ve been selling U2F tokens on Amazon. I’ve been selling an average of 150 units per month and have ordered multiple batches over the past two years. Due to recent developments with FIDO2, WebAuthn, and...

Over the past few months I’ve been working on a program to convert images of technical drawings into digital formats. In other words, the program will convert an image like this. Into a digital format that can be used in...

Everyone’s workspace is different. Mine is a culmination of things that I’ve seen from other people’s workspaces and tools that I’ve found useful. Here is my main desk. It’s a bit messy but that’s okay. I use it as a...

A friend and I recently decided to get electric longboards. Except most of them suck or are pretty expensive. We figured maybe the DIY route wouldn’t be too hard and we could make something pretty sweet. I wanted to make...

I wanted to share some details on the U2F Project now that it has been on the market for over a year now. This is to give an idea of what to expect in terms of cost and profit from...

At some point I developed an interest in magnetic levitation. And I decided to make a clock with levitating arms. I thought it would be a great opportunity to get some more analog circuit experience. It would also be a...

I recently got a 3D printer for home prototyping. One thing I wanted to make was a puzzle that took advantage of the strengths of 3D printing. I didn’t really find anything I liked on Thingiverse so I decided to...

If you want to mass produce some physical product in a short amount of time, chances are you would need to get a mold made. Most plastic parts get made via a plastic injection molding process, where molten plastic is...

This is an update to a previous post about designing a credit card emulator. I got a custom made coil and it didn’t work. I’m concluding the project here. I first attempted to generate a magnetic field using only PCB...

What this project is Some time ago I got interested in emulating magstripes with electromagnets. There are some other projects that have done this, like magspoof. What I am really interested in figuring out is how to get the form...

A review of surface mount buttons I haven’t posted in a long time and I am now finally making updates. I’m going to start with something super exciting (not really). This is a brief review of some surface mount buttons....

I made a two factor authentication token and have made it available on Amazon. In this post I’ll talk about the design, how I produced it affordably, and some metrics about selling on Amazon. If you’re interested in doing something...

I just attended Defcon 24 in Las Vegas and went to SAC (Selected Areas in Cryptography) afterwards. Defcon Defcon is a great conference that hosts around 15k people every year. People come to share their new research in infosec and...

Exploitable Method By exploitable, I don’t mean in the traditional security sense. I mean exploitable by lazy undergraduate students. Pearson Education runs a large set of web applications that colleges use to automate their tedious ABET required courses. I was...

Dirty Cheap Dirty Boards If you want to order custom made PCB’s for a small price, Dirty PCB’s is probably your cheapest option. This used to just be a service that was internal to Dangerous Prototypes to make cheap boards...

New authentication cipher Keyak is an authenticated crypto system that is based on the Keccak sponge primitive. It is a candidate for the authenticated encryption standard in NIST’s Caesar competition. For those not familiar, Keccak is the recent new standard...

The Challenge One of my recent final projects in school was to take a given software program and make it as fast as possible while still being functionally correct. It was graded based on speed and how it ranked against...

Linx Many file sharing servers already exist; a lot of them come and go. Services Google Drive and Drop Box are the big ones. Also there’s have more lightweight options like pastebin or python -m SimpleHTTPServer. Linx is a recent,...

For those that don’t know, a botnet is a network of hacked computers that somehow connect back to a command and control server which instructs the network to conduct malicious activities like DDOS attacks, phishing, or spam. What happened This...

The Challenge I recently competed in CSAW with a few friends. For those that don’t know, CSAW (Cyber Security Awareness Week) is an online CTF where a group at NYU Poly puts up challenges related to computer security. One of...

btproxy I’ve recently been interested in investigating the security of new technologies. New devices, especially in the “IoT” realm, use Bluetooth to communicate. I got interested finding a good way to get insight to Bluetooth connections. I wanted to be...

Here are the class prerequisite graphs for all of the departments at Virginia Tech (Fall 2015). Sorry for those that are bandwidth impaired. It was made by scraping this page and passing the results to a graph function in Wolfram...