checksum
nounUK /ˈtʃek.sʌm/
US /ˈtʃek.sʌm/
A checksum is a special number that helps a computer check if its information got messed up.
The computer compared the checksum to make sure the file arrived safely.
OTHER MEANINGS
2. A value calculated from data to detect accidental changes during storage or transmission.
The download failed because the checksum did not match the original file.
3. A simple sum of digits used to validate a number such as an account or identification code.
The bank uses a checksum to catch typos in account numbers.
4. In networking, a field in a packet that verifies the header and payload were not corrupted.
The router dropped the packet after the checksum showed an error.