Nelson Murilo Nelson Murilo has been working as a network security analyst since 1992. He is the author of two network security books in Portuguese and a regular contributor to the Brazilian Computer Emergency Response Team's published papers (security guides and technical papers). Nelson is the author of open source security tools including: chkrootkit - Locally checks for the presence of a rootkit Beholder -Linux wireless IDS He is a regular speaker both at events in Brazil and at international conferences such as Defcon, Thotcon, SAS Kaspersky, Ekoparty, MS Bluehat and Auscert. @nelsonmurilo