DarthNull.org • About Ⓘ

Hello! I'm David Schuetz.
This is where I ramble about...stuff.

Writeups for cryptography and other kinds of puzzles, contests, and games. Mostly from security cons. For a bit more description of the various contests (and some writeups which I still haven't delivered), see the Puzzles and Contests page.

ShmooCon 2017 Badge (and more) Contest - Solutions

cryptographypuzzles

ShmooCon 2017 Badge (and more) Contest - Challenges

puzzles

BSidesLV 2014 Badge Contest

puzzles

Dark Reading on the VZ DBIR puzzle

puzzles

BSidesROC 2014 - Crypto Puzzle

puzzles

ShmooCon 2014 - Crypto Puzzle Slides

puzzles

DBIR Cover Challenge 2013

cryptographypuzzles

ShmooCon 2013 - Crypto Puzzle Slides

puzzles

Winning the Decode This! puzzle at Black Hat

cryptographypuzzles

Fidelis Security Systems’ Decode This 2012

cryptographypuzzles

Verizon 2012 DBIR Challenge

cryptographypuzzles

2012 Verizon DBIR Cover Challenge

cryptographypuzzles

BSides Phoenix 2012 Badge Puzzle

cryptographypuzzles

ShmooCon 2008 Badge Puzzle

cryptographypuzzles

ShmooCon 2012 Badge Puzzle

cryptographypuzzles

How to Lose $1000 in Vegas Without Even Gambling

cryptographypuzzles

DEF CON 16 Punch Card Puzzle

cryptographypuzzles

CarolinaCon Flag Puzzle

cryptographypuzzles

The 2009 Verizon Data Breach Investigation Report

cryptographypuzzles

ShmooCon 2011 Badge Contest

cryptographypuzzles

ToorCon 12 Badge Puzzle

cryptographypuzzles

THOTCON Pre-Sale Code Puzzle

cryptographypuzzles

DEF CON 18 Crypto Challenge

cryptographypuzzles

ShmooCon 2010 Badge Contest

cryptographypuzzles

QuahogCon Flag Puzzle

cryptographypuzzles

THOTCON 0x1 Puzzle

cryptographypuzzles

ShmooCon 2009 Badge Contest

cryptographypuzzles