Biographical Sketch: Jeff Jilg is a Principal Consultant at atsec information security, and is responsible for security assessments in PCI and other realms. His recent contribution to the whitepaper "Payment Card Industry Compliance For Large Computing Systems", complements his generation of over 20 published magazine articles. Jeff is a QSA. He earned his M.S. from the University of Texas at El Paso, and his Ph.D. from Texas A&M University. In addition to security and astronomy interests, he herds cats in his spare time.