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Uploaded on Aug 23, 2010
Roel Schouwenberg, Senior Anti-Virus Researcher -- Roel discusses his research into the Stuxnet worm. He took a legitimate software package and removed the signature of the digital certificate it contained, then installed the package on his computer. The Installer application didn't indicate that the certificate had been modified. Schouwenberg had to drill down into the file's digital properties in order to discover that the signature had been removed.