The Zodiac Killer’s most uncrackable cipher has, at last, been solved
The 340 cipher — so-named for its number of characters — was solved by an international three-person team of codebreakers: American computer programmer David Oranchak, Belgian computer programmer Jarl Van Eycke and Australian applied mathematician Sam Blake.
Let’s Crack Zodiac – Episode 5 – The 340 Is Solved! (Youtube)