Cryptology is an umbrella term for cryptography and cryptanalysis. Cryptology is usually taken to mean the study of mathematical, linguistic, and other coding patterns and histories. "Cryptography" is used in many English language publications in the field, as an equivalent 'highest order' term for the entire field. In several European languages cognate terms seem to follow the pattern given here. English, as is often the case, is more flexible (or confused, depending on taste). It certainly introduces a note of confusion in translating between languages in one camp and English. The expression umbrella term means a word that provides a superset or grouping of related concepts. ... The German Lorenz cipher machine, used in World War II for encryption of very high-level general staff messages Cryptography (or cryptology; derived from Greek κÏυπτός kryptós hidden, and γÏάφειν gráfein to write) is the study of message secrecy. ... Cryptanalysis (from the Greek kryptós, hidden, and analýein, to loosen or to untie) is the study of methods for obtaining the meaning of encrypted information, without access to the secret information which is normally required to do so. ... The German Lorenz cipher machine, used in World War II for encryption of very high-level general staff messages Cryptography (or cryptology; derived from Greek κÏυπτός kryptós hidden, and γÏάφειν gráfein to write) is the study of message secrecy. ... This article or section does not cite its references or sources. ...
Some famous uses of codes in cryptography have been by famous people throughout history. One of these people is Julius Caeser. Julius used to code his messages using the caeser cipher a simple technique of designating a letter of plain text alphabet to a shifted alphabet.
e.g.
abcdefghijklmnopqrstuvwxyz
xyzabcdefghijklmnopqrstuvw
using this shifted alphabet your message could be "hello" which would be tranferred into code by using the letters under the first alphabet. Hello would then become Ebiil and therefore noone would able to read your message unless they knew the cipher.
Cryptology is an engineering discipline, informed by telecommunications engineering practice, the communications theory aspects of information theory (see Shannon and Weaver, Mathematical Theory of Communication, University of Illinois Press, (about 1949), and Shannon's articles (in 1949?) in the Bell System Technical Journal on communications secrecy, and by the theory of computational complexity.
Cryptology is often taken as a synonym for cryptography and occasionally for cryptanalysis as well, but specialists in the field have for years adopted the convention that cryptology is the more inclusive term, encompassing both cryptography and cryptanalysis.
Often referred to as the "definitive" work on cryptology, this is a massive volume that exhaustively covers the history of codes and codebreaking from ancient times through the Cold War.
By the end of the 15th century, "cryptology had become important enough for most states to keep full-time cipher secretaries occupied in making up new keys, enciphering and deciphering messages, and solving intercepted dispatches" (@ Kahn 108-9).
The popularity of cryptology was not limited to those who used it for military and diplomatic intelligence.
The increasing popularity of cryptology in the 16th and 17th centuries is clearly attested to by the proliferation of books on the subject.
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