1. A
set of unambiguous rules specifying the manner in which
data may be represented in a discrete form.
Note 1: Codes may be used for brevity or
security.
Note 2: Use of a code provides a means of converting
information into a form suitable for
communications, processing, or encryption. (
188 )
2. [Any]
system of communication in which arbitrary groups of letters, numbers, or symbols represent units of
plain text of varying length.
Note: Codes may or may not provide security. Common uses include: (a) converting information into a form suitable for communications or encryption, (b) reducing the length of
time required to transmit information, (c) describing the instructions which control the
operation of a
computer, and (d) converting plain text to meaningless combinations of letters or numbers and vice versa. [
NIS]
3. A
cryptosystem in which the cryptographic equivalents, (usually called "code groups") typically consisting of letters or digits (or both) in otherwise meaningless combinations, are substituted for
plain text elements which are primarily words, phrases, or sentences.
4. A
set of rules that maps the elements of one set, the
coded set, onto the elements of another set, the
code element set.
Synonym coding scheme. 5. A set of items, such as abbreviations, that represents corresponding members of another set.
6. To represent
data or a
computer program in a symbolic form that can be accepted by a
processor.
7. To
write a
routine.