checksum
2 ResultsDictionary
checksum
A value used to ensure data are stored or transmitted without error. It is created by calculating the binary values in a block of data using some algorithm and storing the results with the data....
Dictionary
Definition: checksum
A value used to ensure data are stored or transmitted without error. It is created by calculating the binary values in a block of data using some algorithm and storing the results with the data. When the data are retrieved from memory or received at the other end of a network, a new checksum is computed and matched against the existing checksum. A non-match indicates an error.
Just as a check digit tests the accuracy of a single number, a checksum tests a block of data. Checksums detect single bit errors and some multiple bit errors, but are not as effective as the CRC method. Checksums are also used by the Sophos antivirus software to determine if a file has changed since the last time it was scanned for a virus. See ECC memory and Sophos.
THIS DEFINITION IS FOR PERSONAL USE ONLY
All other reproduction is strictly prohibited without permission from the publisher.
© 1981-2010 The Computer Language Company Inc. All rights reserved.
Sponsored White Papers, Webcasts & Resources
-
Increasing Efficiency in the IT Environment
The read/write capabilities of your system are coming in to play more and more. Check out this white paper to learn more about improving your system's I/O capabilities.
-
ZFS data integrity tested
File systems are supposed to protect your data, but most are 20-30 year old architectures that risk data with every I/O. The open source ZFS from Sun Oracle claims high data integrity - and now...
-
Apple announces ZFS on Snow Leopard
Finally, a modern file system on a consumer OS As if Grand Central weren't enough bad news for Microsoft, now they have ZFS to contend with. Building a reliable, high-performance file system...
Additional Results
-
ZFS data integrity tested
File systems are supposed to protect your data, but most are 20-30 year old architectures that risk data with every I/O. The open source ZFS from Sun Oracle claims high data integrity - and now...
-
MBTA published checksum info in court filings
Something most troubling in the email exchange between Electronic Frontier Foundation lawyer Jennifer Granick and MBTA attorney Leuan Mahony, posted by News.com. The essence is that MBTA itself...
-
Apple announces ZFS on Snow Leopard
Finally, a modern file system on a consumer OS As if Grand Central weren't enough bad news for Microsoft, now they have ZFS to contend with. Building a reliable, high-performance file system...
-
Software security--a matter of trust
In light of recent attacks against well-known open source software sites, Larry Seltzer has gleaned some lessons about what is and isn't trustworthy when it comes to downloadable software.
The best of ZDNet, delivered
ZDNet Newsletters
Get the best of ZDNet delivered straight to your inbox
Vendor Showcase
