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Summation check

In telecommunication, the term summation check (sum check) has the following meanings:

A check based on the formation of the sum of the digits of a numeral.
- Note: The sum of the individual digits is usually compared with a previously computed value.
A comparison of checksums on the same data on different occasions or on different representations of the data in order to verify data integrity.

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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Summation check".