The talks I plan on attending, in chronological order: A Paranoid Schizoprehnia-based Model of Data Security Marsh Ray Friday 1530 Main Track Gone in 60 Minutes: Stealing Sensitive Data from Thousands of Systems Simultaneously with OpenDLP Andrew Gavin Friday 1630 Main Track ZigBee Security: Find, Fix, Finish Ryan Speers and Ricky Melgares Friday 1730 Main [...]
I have been a flurry of posts for the past few days, and have gained interest with this simple, pen-and-paper-able cipher. The more I think about it, the more improvements I make. I am going to start with a brief introduction of some related ciphers, and then break down my cipher. If it seems I [...]
Nothing is as humbling as realizing your mistakes after-the-fact. Let’s review the cipher from my previous post, locate some flaws, and make some improvements. First, while permuting the key with ciphertext would make the final text more diffused, because the Vigenere Cipher is not much more than basic modulo arithmetic, the diffusion added from the [...]
Having too much fun with my droid, I have continued to read about the awesome scripts and programs available. One that caught my eye was A script for blowfish encrypted SMS messages. SMS isn’t secure, and I thought, “How cool would it be if I could encrypt messages on my phone and keep the key [...]
A few days ago I caved in, cancelled my AT&T service early (something I’ve been meaning to do for a while), and picked up a Motorola Droid 2 from Verizon. When I first turned on my new Droid 2, I noticed Verizon had added a bunch of useless apps that I could not remove. A [...]
This post serves as a (hopefully soft) introduction to the MD5 cryptographic hash. It has been written to bring some of the people I work with up-to-speed on exactly how MD5 works in the hopes they will stop giving me strange looks when I talk about it. What is MD5? MD5 is a cryptographic hash. [...]
Recently I found myself coming across numerous WPA-PSK encrypted wireless APs, with a desire to access them. I think it’s safe to say we all know about the WPA CoWPAtty tables, but these APs did not have names that were in the tables. To make matters worse, at the time the only available hardware I [...]
Only about 1/4 of my projects ever make it to any sort of announcement or release. Usually, those releases are silent through svn somewhere. However, I’ve finally reached the time to take a look at the stock market, and have figured, naturally, my best bet is with tech stocks. In any case, I thought tonight [...]
A Quick Background on Perfect Rainbow Tables Rainbow tables allow us to find plaintexts to cryptographic hash algorithms quickly. They are based off of Hellman Martin’s “A Cryptanalytic Time – Memory Trade-Off“. By including the step in the reduction function, Phillipe Oechslin was able to improve on Hellman Martin’s method, and we came up with [...]
I posted x86 Assembly for C Programmers 1 to reddit and got some great feedback. There were a few things that were brought up, and I’m taking a minute to address some of them (I’m not addressing everything). Thanks to everyone out there who took the time to point out mistakes and make suggestions.