What is the whole picture of the ciphertext of the mysterious serial murder 'Zodiac Killer' being deciphered over 51 years?
It is reported that the ciphertext '340 ciphertext' left by the criminal was deciphered over 51 years in the
Zodiac '340 Cipher' cracked by code experts 51 years after it was sent to the SF Chronicle --SFChronicle.com
https://www.sfchronicle.com/crime/article/Zodiac-340-cypher-cracked-by-code-expert-51-years-15794943.php
The Zodiac Killer is a serial murder that killed at least five people and injured two, starting with the shooting of two young men and women near San Francisco in 1968. Article Zodiac incident investigation is also unresolved incident in progress at the time of writing, from the bizarre features such as criminal leaves a message in encrypted text that has been marked by the symbol enigmatic movie 'published in 2007 Zodiac It became the motif of various movies and dramas such as '.
The man, commonly known as 'Zodiac' (English for zodiac ), who is believed to be the culprit in the Zodiac case, has sent several letters to media outlets such as the American daily San Francisco Chronicle, one of which. Is called '408 ciphertext' because it was written with 408 symbols.
The 408 ciphertext was deciphered by high school teachers Donald Harden and his wife in 1969, saying, 'I like killing people, because it's more fun than hunting wild animals in the woods. 'From' 'When I die, I will be reborn in paradise, and the person I kill will be my slave.'
In addition, Zodiac also left a '340 ciphertext' consisting of 340 symbols, which was much more complicated than the 408 ciphertext, so FBI and cryptographic experts worked on decryption. However, the content was unknown so far.
However, on December 5, 2020, it was reported that the 340 ciphertext was finally cracked by an amateur cryptanalysis team of three, including Australian mathematician Sam Blake.
You can see the contents of the ciphertext and the process leading up to the decryption by watching the following movie posted on YouTube by David Oranchak, a member of the decryption team.
This time, it was Mr. Blake who succeeded in deciphering the 340 ciphertext ...
They are Belgian warehouse manager and excellent programmer Iar Banayke, and Oranchak.
This time, it is this AZ decrypt that Mr. Oranchak and others used to decrypt the 340 ciphertext.
As always, Oranchak, who was working on decryption with Blake and others, notices the following decryption statement derived by AZdecrypt. This is one of the 650,000 decryption examples output by AZdecrypt, and at first glance it makes no sense, so most people will pass it through.
However, if you look closely, you will find meaningful phrases such as 'HOPE YOU ARE', 'TRYING TO CATCH ME', and 'OR THE GAS CHAMBER'. increase. For Oranchak and others who have seen meaningless strings for years, this was a big step forward.
In breaking the cipher completely, Blake divided the 340 ciphertext into three paragraphs.
Mr. Blake read these three paragraphs by applying the following rule, 'A symbol and the symbol that is shifted by two characters in the line below it are related.'
The actual ciphertext of the rules used by Mr. Blake is as follows.
Entering the first paragraph sorted according to this rule into AZdecrypt did not produce any meaningful content. However, AZdecrypt has the ability to fix phrases that already have a meaning, such as 'HOPE YOU ARE', and decipher the rest. If you use this function to further decipher ...
New meaningful phrases such as 'TV SHOW' have emerged.
Mr. Oranchak, who found out this, said that he had inadvertently turned over from the chair.
That's because Zodiac once declared that he would appear on a television show over the phone.
Moreover, in the program, a person who actually claims to be the criminal called and said, 'I don't want to go to the gas chamber.' This made it very likely that phrases such as 'TV show' and 'gas chamber' that were deciphered from the 340 ciphertext were not just coincidences, and provided clues for subsequent decipherment.
The full text of the 340 ciphertext thus decrypted by Oranchak et al. Is as follows. There are spelling mistakes, but when translated into Japanese, 'I hope everyone trying to catch me will enjoy it a lot. But I wasn't on TV. The difference with me is that I am. I'm not afraid of gas chambers because it sends me to paradise promptly. I already have enough slaves to work for me. Others are in paradise. I have nothing to reach. So I'm afraid of death, but I'm not afraid because I know my new life. My life becomes richer by death in paradise. It will be. '
Following the decryption by Oranchak and others, the FBI, through the San Francisco Chronicle, said, 'The FBI is aware that the code for the Zodiac case was decrypted by civilians. The case was in collaboration with a local law enforcement agency. The investigation is still underway. '
'The Zodiac Killer has terrorized communities across Northern California, and decades later, we've been committed to these brutal crimes,' said Cameron Paulan, a spokeswoman for the FBI San Francisco office. We will continue to pursue justice for the victims. We are currently investigating and refraining from further comments at this time due to consideration for the victims and their bereaved families. '
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