Code | Definition & Facts | Britannica
https://www.britannica.com/topic/code-communications
WebAug 17, 2023 · Code, in communications, an unvarying rule for replacing a piece of information such as a letter, word, or phrase with an arbitrarily selected equivalent. The term has been frequently misapplied and used as a synonym for cipher, which is a method for transforming a message according to a rule to conceal its meaning.
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