Last weekend, I heard about this book that has clues to twelve jewels hidden throughout the nation (actually tokens are hidden, which are redeemable for jeweled critters). After searching for more information about the book (which is apparently sold out everywhere), I stumbled across a few more puzzles which eventually lead me to the page linked below. Elonka's list contains some very interesting codes and ciphers which have yet to be cracked even with all the computing power available today. The one that interested me the most, however, is Kryptos - a sculpture on the grounds of the CIA. Three of the four quadrants have been solved, yet one remains. It's quite interesting to read about and took up quite a few hours of my time last weekend. I just happened to have the tab still open in Firefox and decided to blog about it.

URL: Elonka's List of Famous Unsolved Codes and Ciphers