A mathematical process that can be applied to a file or other data to create a unique number relative to the contents of that file. If the file is modified, the checksum will change, usually indicating that the file in question has failed to download correctly or has been modified in some way.
The result of a computation during which from a large set of data a small figure or few characters are determined that change, when the data changes.
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
