7 Codes You’ll Never Ever Break

Wired Magazine reminds us of humanity’s failure to unlock the secrets of seven famous codes in their recent article, “7 Codes You’ll Never Ever Break“. The list features some of the usual well-known mysteries, including the Zodiac Killer’s 340-character cryptogram….

Detailed analysis of the 408 solution

I’m curious to know who wrote the Concerned Citizen key, a mysterious correspondence that produces an accurate solution to the Zodiac Killer’s 3-part cryptogram. The key was sent to the police a day after the Hardens’ solution was published in…

Who is the “Concerned Citizen”?

On July 31, 1969, the Zodiac killer mailed three letters to three different San Francisco newspapers. Each letter included details about his recent murders, and a third of his 408-character cryptogram. The pieces of the cryptogram were soon published, and…

The Copiale Cipher – Update

Last year, USC machine translation specialist Kevin Knight and his group of researchers cracked the “Copiale cipher”, 105 pages of mysterious enciphered text from the 18th century. Yesterday, Wired published this fascinating and detailed account of how it all went…

Zodiac Haunted House

“Serial killers provide the frights at N.Y. haunted house” Exploitative entertainment? Or innocent Halloween fun?

Cramming anagrams

Özcan Türkmen, a German-born software engineer and art critic living in Turkey, recently published this solution for the unsolved 340-character cipher: Halt Idiot Paul, Presidio killing. Lord of sick mankind killed all idiots, silly morons; am psycho, ain’t stop killing…

A shared delusion

Everybody likes a good story. Well, once again, the Corey Starliper story, which is over a year old, is enjoying another new round of attention: The evidence is quite clear that anyone could use Corey’s decryption technique to invent their…

Zkdecrypto: Lite edition

Programmer Dan Umanovskis has been busy running many experiments on the unsolved 340-character cipher. During his experiments, he used the zkdecrypto software to look for solutions for test ciphers and variations of the 340 cipher. But the current version of…

Newspaper article collection

While Zamantha was digging up Thomas Dougherty’s letters at the San Francisco Public Library, she also made copies of their collection of newspaper article clippings. The collection contains an assortment of Zodiac-related articles from 1978 to 2009. Zamantha generously sent…

Thomas Dougherty’s “code theory”

Thirty-seven years ago, a man named Thomas Dougherty came up with a Zodiac “code theory”, and mailed dozens of bizarre letters from the Hotel Warfield in San Francisco to United States federal judge Oliver Carter. The letters were recently unearthed…