Pronunciation: (krip"tu-nal'u-sis), [key]
1. the procedures, processes, methods, etc., used to translate or interpret secret writings, as codes and ciphers, for which the key is unknown.
2. the science or study of such procedures. Cf. cryptography (def. 1).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.