10 letters · 21 points in Scrabble
noun the science of analyzing and deciphering codes and ciphers and cryptograms
originFrom crypto- + -logy, from Ancient Greek κρυπτός (kruptós, “hidden”) + λόγος (lógos, “word”); originally after Latin cryptologia, which is apparently first recorded in an English context.
Etymology from Wiktionary, CC BY-SA 3.0