A cehcksum is a way of validating the data in a block of data. You run a checksum programme on a file and it will return a specific value, if the file changes it will return a different value. therfore if someone makes available the checksum for the official version of a file then you can download the file, run the appropriate programme to generate the checksum for the file and if the two match you can be reasonably sure you have downloaded the original file and not something that has been modified.
Checksums are a usefull device and can be used anywhere you need to verify that the correct data has been received.
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Nak
Is it just me, or does something smell suspicious about all this?
about checksum........ 
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