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Zodiac Killer Letters and Ciphers -- Codes, Cryptography. Between 1966 and 1974, the Zodiac killer provided more than 20 written communications to police officials, some including ciphers that have not been cracked to this day. Zodiackiller.com features the most complete collection of authenticated Zodiac writings available anywhere in the world.
- Zodiac-Button Letter, Cipher
Mailed: June 26, 1970 Postmarked: San Francisco, Calif. Sent...
- Zodiac-Button Letter, Cipher
- Z 408, Sent July 31, 1969
- Z 340, Sent November 8, 1969
- Z 13, Sent April 20, 1970
- Z 32, Sent June 26, 1970
The first cipher Zodiac created was his longest, 408 characters. The killer split it into three pieces of equal length and mailed two to newspapers in San Francisco and one to a paper in nearby Vallejo, demanding they be printed or he would go on a “kill rampage.” The ciphers were published. Who Cracked It: Within about a week North Salinas schoolt...
While Z 408 required only 20-some hours for the husband-and-wife team to solve, Zodiac’s next cipher stumped everyone—experts and amateurs alike—for 51 years. Who Cracked It:In December 2020, the FBI announced that the Z 340 had finally been cracked, but not by professional law enforcement. The amateur team of sleuths who decoded the cipher include...
The killer’s shortest cipher appears, on the surface, to be the most important. It is preceded by the words “My name is ⎯⎯” Would the killer really reveal his name? Zodiac made a big promise about the Z 408 cipher, writing, “By the way, are the police haveing [sic] a good time with the code? If not, tell them to cheer up; when they do crack it they...
Sometimes known as the “Map Code,” because it came with a map of the San Francisco Bay area, Z 32 is Zodiac’s strangest cipher. A symbol closely resembling the cross-hairs image used by Zodiac to sign many of his messages appears on the map as a compass, with the instructions “0 is to be set to Mag. N.” This is one of several indicators that Zodiac...
- Craig P. Bauer
Nov 30, 2023 · Welcome to the Zodiac Ciphers wiki. This wiki is an attempt to gather all useful factual and verifiable information pertaining to the ciphers associated with the "Zodiac Killer". It is also a place to post results of experimental analysis of the ciphers. There is so much information on these ciphers, but it is very hard to find in one place.
The cipher was a series of symbols, presented in 8 rows of 17 symbols for a total of 408 characters; all Zodiac Ciphers are referred to by the length of the message, hence this one is Z 408. As well as letters and reverse letters, the symbols included squares and circles, with various parts shaded, and mathematical symbols.
The Zodiac cipher is the generic name given to a series of ciphers used by a serial killer around San Francisco Bay, United States in the 1960s and 1970s. Zodiac is the name given to this serial killer who would be responsible for at least 7 victims in California (according to the authorities/FBI because he claims 37 victims).
- Symbol Substitution
- The Zodiac Killer is the nickname given to an unidentified criminal who committed a series of murders in the USA. The identity of the Zodiac murder...
- The Zodiac sent at least 17 letters to local newspapers. These letters sometimes contained evidence of crimes and sometimes cryptograms. It is thes...
- The Z408 and Z340 messages are homophonic substitution ciphers: the same letter can be encrypted by several different symbols. Example: A can be en...
- The decryption based on Z408 is that of a homophonic substitution, each character / symbol is associated with a plain letter, and several symbols c...
- Crypto Z-408 was sent on July 31, 1969 in 3 pages and was decoded in only 20 hours by a teacher Donald Harden and his wife Bettye. The message was:...
- The Crypto Z-340 was sent on November 8, 1969, it was resolved 51 years later in December 2020 here (link) The message is written in a grid of 17 c...
- Crypto Z-13 is dated April 20, 1970, it is the shortest, it is preceded by MY NAME IS which suggests that the killer could reveal its identity. The...
- The crypto Z-32 was sent on June 26, 1970, it was accompanied by a map of the San Francisco Bay. The investigators assume that this cryptogram may...
1969 October 7th- The Good Citizen Letter. 1969 October 11th- The Presidio Heights Murder. 1969 October 13th-The Paul Stine Letter. 1969 October 14/15th- Zodiac Call to Santa Rosa. 1969 October 21st- The Phone Call to Palo Alto. 1969 October 22nd- Call to Chat Show. 1969 November 2nd- Daniel Williams Poisoning.
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Jun 24, 2021 · The papers printed the ciphers (or cryptograms) as Zodiac threatened to kill again if his instructions weren't followed. The cipher, which was simpler than later efforts, was solved a week later ...
