Sam Blake, an Australian mathematician, first learned of the Zodiac Killer's unsolved ciphers — a series of encrypted messages — from a documentary in the 1990s. His interest marginally ...

The solution to one of the Zodiac Killer’s cipher, unsolved for 51 years, was cracked by a team of citizen codebreakers earlier this month, with the FBI confirming the decoded message’s ...

Few cases have captured the public's imagination and baffled investigators quite like the Zodiac Killer. For decades, this unidentified serial murderer taunted law enforcement and the public alike ...

These cryptograms represented a new and perplexing element to the pursuit of the Zodiac. 65 years later, of the four ciphers sent, two remain unsolved, and one was only finally deciphered in 2020.

Ziraoui's long, detailed posts describe the process by which he says he cracked two of Zodiac's unsolved ciphers, known as Z13 and Z32. Z13 was sent to the San Francisco Chronicle in 1970 and says ...

Sent in 1969 after a schoolteacher and his wife cracked the Zodiac Killer’s first cipher, the 340-character cipher was more complex and remained unsolved, even by a supercomputer designed to ...

“The FBI is aware that a cipher attributed to the Zodiac Killer was recently solved by private citizens,” they wrote in a December 2020 tweet. The two remaining ciphers are still unsolved, and more ...

In November 1969, the Zodiac Killer sent a 340-word cipher to the San Francisco Chronicle. The cipher proved difficult to crack and was left unsolved for decades. Eventually a team of two soft ...

According to the Chronicle, there are two other ciphers sent to papers decades ago that remain unsolved—and perhaps it's one of them that will provide the key to unlocking the Zodiac's ...

So, who was the Zodiac killer really? A depraved figure who took the life of at least five people and eluded authorities for decades, he gained notoriety for the taunting letters and ciphers he ...

The Zodiac, as he dubbed himself in one ... more unique symbols, etc.), the cipher might still remain unsolved.” The white paper has been posted to preprint server arXiv.