Encyclopedia > Communication Theory of Secrecy Systems
Communication Theory of Secrecy Systems is a paper published by Claude Shannon discussing cryptography from the viewpoint of information theory. It is one of the foundational treatments (arguably the foundational treatment) of modern cryptography.
Communication permeates all levels of human experience and it is central to understanding human behavior and to nearly all public health efforts aimed at fostering health behavior change among individuals, populations, organizations, communities, and societies.
Since communicationtheory remains a relatively young field of inquiry and integrates itself with other disciplins such as philosophy, psychology, and sociology, one probably cannot yet expect a conceptualization of communication which all or most of those who work in the area would share.
The great divide between speech communication and mass communication becomes complicated by a number of smaller sub-areas of communication research, including intercultural and international communication, small group communication, communication technology, policy and legal studies of communication, telecommunication, and work done under a variety of other labels.
During this period Shannon worked in many areas, most notably in information theory, a development which was published in 1948 as ``A Mathematical Theory of Communication'' [37].
In a paper ``CommunicationTheory of SecrecySystems'' [25] cryptography is related to communication in a noisy channel, the ``noise'' being in this case the scrambling by the key of the cryptographic system.
Among these were communicationssystems with feedback and a study of the rate at which it is possible to approach ideal coding as a function of delay.
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