The Zodiac Killer's Cipher Is Finally Cracked After 51 Years

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The Zodiac Killer's Cipher Is Finally Cracked After 51 Years
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Ever since the letter was sent to the San Francisco Chronicle in 1969, both amateur and professional cryptographers, including those working for the FBI, have worked to crack the cipher. (From 2020)

, a trusted source for technology news, tech policy analysis, reviews, and more. Ars is owned by WIRED's parent company, Condé Nast.killed at least five people and attempted to kill at least two more in Northern California in 1968 and 1969. In the first three attacks, he targeted couples. The first two murder victims were high school students who were parked in a car on their first date. In attacks on the other two couples, he managed to kill the women, but the men survived.

A week after the letters were sent, a couple in Salinas, California, cracked the cipher. The Zodiac Killer, the plaintext revealed, said he was collecting slaves for the afterlife and that he wouldn’t disclose his identity because doing so would interfere with those plans.The San Francisco Chronicle The decoded message squares with much of what is already known about the case. The mention of the TV show and gas chambers refers to a call made to a talk show on KGO-TV a month earlier, in which someone claiming to be the Zodiac Killer said: “I need help. I’m sick. I don’t want to go to the gas chamber.” In other communications, the killer used the same misspelling for the word “paradise.” And of course, there were earlier references to collecting slaves for the afterlife.

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