checksumfunction
nounUK /ˈtʃek.sʌm ˌfʌŋk.ʃən/
US /ˈtʃek.sʌm ˌfʌŋk.ʃən/
A checksum function is a tool that makes a special number from data so you can tell if the data got changed.
The program uses a checksum function to make sure the downloaded file is not broken.
OTHER MEANINGS
2. A mathematical routine that turns a block of data into a short fixed-size value for comparison.
Engineers compared the checksum function outputs before and after transmission.
3. A function used in networking to verify that packets arrived without errors.
The router applies a checksum function to each packet header.
4. A routine in file systems that detects accidental corruption of stored data.
The backup tool runs a checksum function on every saved file.