CHECKSUM

checksum

(noun) a digit representing the sum of the digits in an instance of digital data; used to check whether errors have occurred in transmission or storage

Source: WordNet® 3.1

Etymology

Noun

checksum (plural checksums)

(mathematics, computing) A number, derived by applying a suitable algorithm to some data, used to check whether errors have occurred in transmission, storage or data entry.

Verb

checksum (third-person singular simple present checksums, present participle checksumming, simple past and past participle checksummed)

(mathematics, computing) To compute a checksum.

Source: Wiktionary