Cipher challenge platform
Appears in 1 story
Hosted Vatican Challenge Part 5 since July 2019; showed zero solves as of September 16, 2026
A 484-year-old papal letter, written in a numeric cipher with variable-length codes and decoy nulls, has been cracked using simulated annealing, an optimization algorithm from machine learning. The recovered key, 18 letters plus one null, held up whether the ciphertext's first or second half was solved independently.
Updated 2 hours ago
No stories match your search
Try a different keyword
How would you like to describe your experience with the app today?
