A checksum is a string of characters which uniquely identifies afile, a digital fingerprint. Change even a few bytes of a file–forexample, by infecting it with a virus or replacing an old versionwith ...

Mostly we’re lazy. We go to a software publisher’s web site and download files and just assume that what’s in the file is what the publisher claims it to be. The problem is that these days web sites ...

Over the years I have not really paid much attention to verifying downloads for the GNU/Linux installation discs when I download them. I used to just download the ISO files, burn them, and sometimes I ...