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error detection and correction code

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n. ~ A short sequence of characters associated with a message that makes it possible to determine if the message has been corrupted and, if necessary, repaired.

Notes: 

Error detection may be implemented without error correction. A hash value is an example of an error detection code. Recalculating the hash value can provide assurance that the original message has not changed. Error correcting codes include enough information to enable the original message to be reconstituted; Reed-Solomon is an example of an error correcting code method.