The Playfair Cipher

The Playfair cipher was invented by Sir Charles Wheatstone and popularized by Baron Lyon Playfair. It is relatively easy to learn and to use with only pencil and paper. It was used during combat in WWII for messages who’s relevance was short lived. I enjoy this cipher mainly because traditionally it’s written down in pairs … [Read more…]

Defcon 21 Badge Challenge Walkthrough Part 3

Floor Puzzles =================== Clock Face ————— The symbols are Rod Numerals ( ) turned sideways every other digit. When converted to letters reads: defcon, 21,¬†keyword, orrery which leads to: Skull Puzzle —————— The symbols on the skull puzzle are actually from another “Chain of Death” cipher from The Shadow You read it … [Read more…]

Defcon 21 Badge Challenge Walkthrough Part 2

Posters: ================= There are 7 posters with cipher text. 4 labeled with numbers that when converted from dec to ascii are labeled J, A, C, and K, and three with key holes. Numbered Posters ———————– – 74 “J” (Social Engineering Village): VEVMRUBLFDZMGGLYVORVEV LMVLUGSVQZXPHWLVHMGYVO (can be decoded with atbash) => EVENIFYOUWANTTOBELIEVE ONEOFTHEJACKSDOESNTBEL – 65 “A” (Wireless … [Read more…]

The Science of Secrecy: Introduction and Future of Cryptography

From the description: Join Imperial’s Institute for Security Science and Technology for an informative presentation on codes, ciphers and computers. Professor Richard Aldrich, Dr Martin Knight, Professor Sir Peter Knight and Dr Simon Singh take you on a tour of cryptography through the ages. From its beginnings in pen and paper to its future in … [Read more…]

Communicating in E-Prime

The way we talk can have profound affects on the way we see the world and, in turn, the way the world sees and interacts with us. One of the easiest ways of eliminating poor, irrational, upsetting, and alienating communication (ie. to increase your general likability) is to stop stating opinions as facts. I recently … [Read more…]

Small World Experiment

We know it today as “six degrees of separation”, but did you know that number is actually loosely based on the results of an actual experiment? In the 1960s Stanly Milgram (you know Stanly Milgram he’s the one that tricked subjects in to thinking they were torturing people for science) set out the answer the … [Read more…]