5 ms·

Amazing. It seems possible that the killer would have required a fairly advanced education to create a cypher with this complexity. Not too many self taught e

• barbegal 6y ago
  The cipher only uses two fairly simple techniques: transposition and homophonic substitution. Both of these are covered in any elementary book on codes and ciphers. Combining the two makes a cipher which is tough but not impossible to crack given a long enough ciphertext as demonstrated here.
• qw3rty01 6y ago
  Nothing really sticks out in the cipher as being inherently complex or requiring advanced education, it's more of just a puzzle where you're meant to figure out arbitrary rules, which in this case weren't even consistent throughout the entire cipher (adding some artificial difficulty). It's pretty out of scope of encryption because it was meant to be broken.
• dtech 6y ago
  This cipher isn't all that difficult, even compared to a simple modern cipher like DES. Ciphers are meant to withstand attacks if you know the rules (algorithm), this one doesn't, making it more of a puzzle than a cipher.
• JKCalhoun 6y ago
  Robert Graysmith (and others?) suggested the Zodiac killer may have been in the Navy.