The IT security industry has seen dramatic changes in the past decades. Security breaches, data theft, cyber attacks, and information warfare are now common news stories in the mainstream media. IT security expertise that was traditionally the domain of a few experts in large organization has now become a concern for almost everyone.
These rapid changes in the IT security industry have necessitated more recent editions of this text. Old attacks are being used in new ways, and new attacks are becoming commonplace. This new ed have captured some of these changes in the industry.