Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A numerical value calculated from a series of bits of digital data, often by summing their values, used to test whether the data has changed during storage or transmission.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun a digit or character, derived by applying a suitable algorithm to some data, used to check whether errors have occurred in transmission, storage or data entry
  • verb To compute a checksum.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun 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

Etymologies

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Examples

  • Of course, it's assuming that whoever built the downloadable file, computed the checksum, and wrote the web page listing the checksum is honest, but it's still a useful check to make.

    How Do You Know If Your Download Really Has A Virus? | Lifehacker Australia 2010

  • That's when Apple first introduced a special operation, called a checksum hash, into its products to ensure that Apple's devices were communicating with iTunes and not some other type of software.

    CSO 2010

  • That's when Apple first introduced a special operation, called a checksum hash, into its products to ensure that Apple's devices were communicating with iTunes and not some other type of software.

    CSO Robert McMillan 2010

  • That's when Apple first introduced a special operation, called a checksum hash, into its products to ensure that Apple's devices were communicating with iTunes and not some other type of software.

    CSO Robert McMillan 2010

  • A checksum is a fixed-size datum that is computed from a block of data.

    gHacks technology news 2009

  • This has to do with a checksum, which is used to confirm the file.

    VideoHelp.com Forum 2009

  • That's when Apple first introduced a special operation, called a checksum hash, into its products to ensure that Apple's devices were communicating with iTunes and not some other type of software.

    CSO 2009

  • In September 2007, Apple introduced new software into iPod that runs a cryptographic operation on iTunes data, creating a special number called a checksum hash.

    Yahoo! News: Technology News 2008

  • The latest iPods have a cryptographic "checksum" in their song databases that prevents third-party applications from synching with the portable music players.

    Boing Boing 2007

  • Lexmark designed their printer program so that it would not accept a toner cartridge unless it received the correct "checksum" or validation number.

    The Public Domain Enclosing the Commons of the Mind James Boyle

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