Everlasting nonsense

Michael Cole has a great recent post on his site concerning the flood of web traffic again generated by the interest in Corey Starliper’s debunked claim of a solution to the 340-character cipher. Michael’s indictment of shoddy journalism is spot…

Mobile codebreaking

This new Zodiac-related iPhone app was released recently by Rene Lowack: Reveal the mysterious secret of the still unsolved encrypted Zodiac letter. Zodiac was a serial killer active in California during the late 1960s and early 1970s. After killing, he…

Throw the book at him! [Part 2]

In Part 1, we looked out how to use Project Gutenberg‘s large collection of about 39,000 digitized books to apply cribs to cipher texts to try to tease out solutions. Another way we can use the collection of books is…

Throw the book at him! [Part 1]

One way to attack a substitution cipher is to guess what part of the plain text solution might be, “plugging” it into where you think it might fit in the cipher text, and then seeing if you can get more…

Lafferty vs the ciphers

Retired Vallejo officer Lyndon Lafferty has been getting a lot of attention for his book in which he claims to know who the Zodiac killer was. The numerous criticisms of his claims aren’t mentioned by the various news stories, but…

Is the 340-character cipher real?

Over forty years of frustration have passed since the Zodiac killer first sent his mysterious 340-character cipher to the San Francisco Chronicle. It only took a week for two teachers to solve his previous cipher. But many thousands of people,…

Create your own ciphers

Mike Cole of ZodiacRevisited.com has released a tool that lets you create your own Zodiac-like cipher texts using homophonic substitution: Cipher Generator. Screenshot: I think this tool is very useful for creating test ciphers that can be fed into cipher…

Zodiac’s favorite words

The killer’s first cipher was solved rather quickly by amateur codebreakers because they guessed that the killer would use words such as “I” and “kill”. Can similar guesswork help us solve the unsolved 340-character cipher? This is something people have…

Welcome

Welcome to the Zodiac Ciphers blog. ┬áHere I will try to post all the latest news on efforts to solve the mysterious Zodiac ciphers, which, with only one exception, have remained unsolved for over 40 years. The Zodiac Killer was…

Launch

The old Zodiac Ciphers wiki, which was previous found at wiki.zodiac-ciphers.dreamhosters.com, was being overrun by loathsome spammers, so I had to take the site down and convert it over to the new location, where I have been able to lock…