Definition of checksum in English:

checksum

Syllabification: check·sum
Pronunciation: /ˈCHekˌsəm
 
/

noun

A digit representing the sum of the correct digits in a piece of stored or transmitted digital data, against which later comparisons can be made to detect errors in the data.
More example sentences
  • Although a UPC number has 12 digits (implying a maximum capacity of a trillion items), the first digit is a category code that in practice is almost always, and the final digit is a checksum used for detecting errors.
  • One adds support for error detection codes such as checksums and cyclic redundancy codes.
  • Hashing is used in many applications, from passwords and other authentication schemes, to digital signatures and certificates, to creating checksums used to validate files.

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