The Zodiac Ciphers: Two Messages That Have Never Been Decoded
The Zodiac Killer sent four coded messages to Bay Area newspapers between 1969 and 1970. The Z408 was solved in a week. The Z340 took 51 years and a team of international codebreakers. The Z13 — a 13-character message prefaced with the words “My name is” — and the Z32 have never been solved. Here is everything we know about the two Zodiac ciphers that still hold their secrets.