Greg Hoglund, Gary Mcgraw

Michael Gregory Hoglund, better known as Greg Hoglund, is a security researcher and a published author on the subject of computer security and computer hacking. He wrote Exploiting Software: How to Break Code, Rootkits: Subverting the Windows Kernel and Exploiting Online Games: Cheating Massively Distributed Systems, speaks regularly on security conferences and wrote several books. Hoglund drew the attention of the media when he exposed the functionality of Blizzard Entertainment's Warden software.

He is perhaps best known for founding cyber security company (HBGary), which found controversy in 2011 after hacktivist group Anonymous leaked emails exposing offers to spy on civilians, corporate rivals and discredit Wikileaks supporters.

Hoglund founded several security startup companies which are still in operation today:

• HBGary, Inc.
• Cenzic, Inc. (formerly known as ClickToSecure, Inc.) Focused on web application security for the Fortune-500. 
• Bugscan, Inc. Developed an appliance that would scan software for security vulnerabilities without sourcecode. Acquired in 2004 by LogicLibrary, Inc.

Hoglund also founded and operates rootkit.com, a popular site devoted to the subject of rootkits. Rootkit.com was compromised in 2011 by the internet hacktivism group Anonymous.