Tap code: Difference between revisions

Revision as of 13:26, 20 September 2007

Revision as of 13:05, 31 January 2008

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{{contradict}} <!-- Invented in 1965, used in a book published 1941 is contradictory. -->

The '''Tap Code''' is a [[cipher]], commonly used by prisoners in jail to communicate with one another. The method of communicating is usually by "tapping" either the metal bars or the walls inside the cell, hence its name. It is a very simple cipher, not meant to avoid interception, since the messages are sent in [[cleartext]].