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Cryptology = Cryptography + Cryptoanalysis
•Cryptology is the mathematics, such as number theory, and the application of formulas and algorithms, that underpin cryptography and cryptanalysis.
Cryptography = Making codes and ciphers systems
Cryptography is the study of the principles and techniques by which information could be concealed in ciphers and later revealed to a legitimate persons through the use of secret keys
Cryptoanalysis = Breaking codes and cipher systems
Cryptography is the study of the principles and techniques by which enciphered information could be revealed or forged without the use of secret keys