Roger Grimes is a 25-year computer security veteran with expertise in host and network security. As part of Microsoft's IS&RM ACE Infrastructure team, Roger focuses on protecting Microsoft's most valued customers by either helping to implement designs and policies that diminish risk or in pushing hackers out. Roger focuses on host security, APT, and PKI these days, but he has 10-years experience as a pen tester and educator, including for Foundstone teaching Advanced Ultimate Hacking for Windows, Linux, and Solaris. Roger has written over 300 magazine articles, authored or co-authored 9 books on computer security, and has been the InfoWorld security columnist for over 6 years.