The science of codes and ciphers (12)
I believe the answer is:
cryptography
(Other definitions for cryptography that I've seen before include "The making and cracking of codes" , "Study of writing and deciphering codes" .)
I've seen this clue in The Guardian.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free.
Check out my app
or
learn more
about the Crossword Genius project.