Zodiac Killer Ciphers Solved

Answer this question in the quiz to reveal the explanation.

Answer this question in the quiz to reveal the explanation.

Answer this question in the quiz to reveal the explanation.

Answer this question in the quiz to reveal the explanation.

Answer this question in the quiz to reveal the explanation.

Answer this question in the quiz to reveal the explanation.

Answer this question in the quiz to reveal the explanation.

Answer this question in the quiz to reveal the explanation.

Answer this question in the quiz to reveal the explanation.

Answer this question in the quiz to reveal the explanation.

Question 1

What 32-character cipher accompanied a map of Mount Diablo mailed by the Zodiac in June 1970?

Question 2

Who successfully solved the Zodiac Killer's initial 408-character cipher (Z408) in August 1969?

Question 3

How many years elapsed before the famous 340-character cipher (Z340) was finally deciphered in December 2020?

Question 4

Which three civilian researchers cracked the Z340 cipher in 2020 using custom computer decryption software?

Question 5

What is the famous opening phrase decoded from the first lines of the solved Z340 cipher?

Question 6

What type of reading pattern did the creator of Z340 utilize to disguise the plaintext across the character grid?

Question 7

What television talk show host was referenced in the decoded text of the Z340 cipher?

Question 8

What word was famously misspelled repeatedly as 'PARADICE' throughout the Zodiac Killer's ciphers and letters?

Question 9

How many characters comprise the short unsolved cipher sent in April 1970 preceded by the phrase 'My name is —'?

Question 10

What mathematical cryptographic classification best describes the encryption mechanism used in the Z408 cipher?

What 32-character cipher accompanied a map of Mount Diablo mailed by the Zodiac in June 1970?