1.5. Using Cryptography
Whereas cryptography pertains to the encoding and decoding of information, cryptanalysis is the reverse of cryptography and is the art of decoding, or breaking, secretly encoded information without knowledge of the encryption keys. The term cryptology, or crypto, refers to the whole subject field.
Security and cryptology are related but different fields, and many people confuse them. Both fields are orthogonal in the sense that each has its own utility without depending on the other, although technology from one can help the other. For example, all the security models discussed so far do not need to use crypto at all. Crypto can be used to enhance confidentiality and integrity and can be studied in the abstract, without ...
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