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March 26, 2021 04:45 pm
Original Link: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/-IhuK0LxQcs/the-solution-of-the-zodiac-killers-340-character-cipher
The Solution of the Zodiac Killer's 340-Character Cipher
Sam Blake, writing at Wolfram Blog: The Zodiac Killer (an unidentified American serial killer active during the 1960s and 70s) sent numerous taunting letters to the press in the San Francisco area with regard to a local murder spree. In these letters, the killer took responsibility for the crimes and threatened to commit further murders. He also included three ciphers, each containing one-third of a 408-character cryptogram. The killer claimed that this cryptogram would reveal his identity when deciphered. The killer sent the fourth and final cipher (discussed in the linked post) to the San Francisco Chronicle after the 408-character cryptogram, deciphered in 1969, did not reveal the killer's identity. In 2020, Melbourne, Australia, had a 112-day lockdown of the entire city to help stop the spread of COVID-19. The wearing of masks was mandatory and we were limited to one hour a day of outside activity. Otherwise, we were stuck in our homes. This gave me lots of time to look into interesting problems I'd been putting off for years. I was inspired by a YouTube video by David Oranchak, which looked at the Zodiac Killer's 340-character cipher (Z340), which is pictured below. This cipher is considered one of the holy grails of cryptography, as at the time the cipher had resisted attacks for 50 years, so any attempts to find a solution were truly a moonshot.Read more of this story at Slashdot.
Original Link: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/-IhuK0LxQcs/the-solution-of-the-zodiac-killers-340-character-cipher
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