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Matthew Lyons is the QA lead for security features of the Common Language Runtime at Microsoft Corporation. He has been testing and developing against the internal workings of .NET Framework security for over two years. Before that, he spent two years testing public key cryptography and the certificate services in Windows 2000. Matt received a B.S. in Applied Physics from Purdue University in 1997 and is currently working on an M.S. in Computer Science at the University of Washington.