During the latter half of the 20th century the world created a new
infrastructure - the cyber, or information, infrastructure.  It underpins
many of the processes and activities of society.  Usefulness of the cyber
infrastructure depends on many aspects, and notable among them is security.
Fundamentally, today's perimeter defense model on which most cyber security
relies does not work, and cannot work.  This talk will characterize the
fragility and the failures of today's cyber security.  It will review past
research, as well as the state of the art and the practice of information
security.  This includes recent intrusion detection research of the speaker.
Options for substantive improvement will be discussed.