Tom Liston is a senior analyst for the Washington, D.C.

Washington, D.C.

Washington, D.C., formally the District of Columbia and commonly referred to as Washington, "the District", or simply D.C., is the capital of the United States. On July 16, 1790, the United States Congress approved the creation of a permanent national capital as permitted by the U.S. Constitution....

-based network security consulting firm, InGuardians, Inc.

He is the author of the first network tarpit, the open source

Open source

The term open source describes practices in production and development that promote access to the end product's source materials. Some consider open source a philosophy, others consider it a pragmatic methodology...

 LaBrea. He was a finalist for eWeek and PC Magazine’s "Innovations In Infrastructure" (i3) award in 2002 for LaBrea. He is one of the handlers at the SANS Institute’s Internet Storm Center

Internet Storm Center

The Internet Storm Center is a program of the SANS Technology Institute, a branch of the SANS Institute which monitors the level of malicious activity on the Internet, particularly with regards to large-scale infrastructure events....

, where he deals with developing security issues and authors a series of articles under the title “Follow the Bouncing Malware

Malware

Malware, short for malicious software, consists of programming that is designed to disrupt or deny operation, gather information that leads to loss of privacy or exploitation, or gain unauthorized access to system resources, or that otherwise exhibits abusive behavior...

.”

Liston is also, with Ed Skoudis, co-author of the second edition of the network security book Counter Hack Reloaded: A Step-by-Step Guide to Computer Attacks and Effective Defenses.