Cryptography Reference
In-Depth Information
Morse code.
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A code is simply an unvarying rule for replacing a piece
of information (e.g., letter, word, or phrase) with another
object, but not necessarily of the same sort; Morse code,
which replaces alphanumeric characters with patterns of
dots and dashes, is a familiar example. Probably the most
widely known code in use today is the American Standard
Code for Information Interchange (ASCII). Employed
in all personal computers and terminals, it represents 128
characters (and operations such as backspace and carriage
