Wikipedia 10K Redux by Reagle from Starling archive. Bugs abound!!!
CryptanalysiS (from the Greek kryptós and analýein, "to loosen" or "to untie") is the science (and art) of recovering information from ciphers without knowledge of the key. CryptologY is often--and mistakenly--considered a synonym for CryptographY and occasionally for CryptanalysiS, as in the popular solution of CryptogramS or CipherS, but specialists in the field have for years adopted the convention that CryptologY is the more inclusive term encompassing both CryptographY and CryptanalysiS.