Intrusion defense mechanisms have been around for approximately two decades. However, slippery assailants continue to evade even state-of-the-art mechanisms. We have more technology than ever but few approaches that work reliably, especially given with the explosion of attack vectors. The problem of accurate and consistent attack detection and defense amid a sea of noise appears no less difficult than during the early years. This talk will attempt to detail the shortcomings of current detection and defense approaches and describe the “Kill Chain” and how it can help improve the efficacy of modern intrusion defense mechanisms.