Programming

The earliest memory I have of ‘programming’ is in the early/mid 90s when my father brought home a computer from work. We could play games on it … so of course I took the spreadsheet program he used (LOTUS 123, did I date myself with that?) and tried to modify it to print out a helpful message for him. It … halfway worked? At least I could undo it so he could get back to work…

After that, I picked up programming for real in QBASIC (I still have a few of those programs lying around), got my own (junky) Linux desktop from my cousin, tried to learn VBasic (without a Windows machine), and eventually made it to high school… In college, I studied computer science and mathematics, mostly programming in Java/.NET, although with a bit of everything in the mix. A few of my oldest programming posts on this blog are from that time.

After that, on to grad school! Originally, I was going to study computational linguistics, but that fell through. Then programming languages (the school’s specialty). And finally I ended up studying censorship and computer security… before taking a hard turn into the private sector to follow my PhD advisor.

Since then, I’ve worked in the computer security space at a couple of different companies. Some don’t exist any more, some you’ve probably heard of. I still program for fun too, and not just in security.

But really, I still have a habit of doing a little bit of everything. Whatever seems interesting at the time!


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Recent posts

A Quick Look at RC4

In cryptography work, RC4 (Rivest Cipher 4) is well known as both one of the easiest to implement and fastest to run symmetric encryption algorithms. Unfortunately, over time there have been a number of attacks on RC4, both in poorly written protocols (such as in the case of WEP) or statistical attacks against the protocol itself.

Still, for how well it formed, it’s an amazingly simple algorithm, so I decided to try my hand at implementing it.

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Generating perfect portmanteaus

A quick programming post, since it’s been a while, inspired by this video:

I’m not going to go quite as far as that, but I thought it would be interesting to write up some quick code to generate portmanteaus1.

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Performance problems with Flask and Docker

I had an interesting problem recently on a project I was working on. It’s a simple Flask-based webapp, designed to be deployed to AWS using Docker. The application worked just fine when I was running it locally, but as soon as I pushed the docker container…

Latency spikes. Bad enough that the application was failing AWS’s healthy host checks, cycling in and out of existence1:

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ts: Timestamping stdout

Loving data as much as I do, I like to optimize things. To make sure I’m actually going the right way, it’s useful to time things. While it’s trivial in most languages to add timing, it’s even easier if you don’t have to.

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update-dotfiles encryption

I do like having my dotfiles on GitHub. For one, it means that they’re always available when I set up a new machine. For two, others can see them and take whatever is interesting for their own dotfiles. But all that has a disadvantage: what if I want to store my SSH configs?

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docker-bash and docker-stop-all

I’ve been using Docker a fair bit at work, so I’ve added a few quick aliases to my dotfiles make that a little bit easier:

  • docker-bash - attach a bash shell to the first available docker instance
  • docker-stop-all - stop all running docker instances

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