The nature and sophistication of cyberattacks have been evolving at an amazing pace. The latest series of attacks was aimed at specific targets, including major defense contractors. The threat du jour is called Advanced Persistent Threats, or APTs. These threats pose a host of new technical challenges because they often involve a population of one. In other words, new threats are being developed using very sophisticated peer-to-peer programming tools that are targeting not just a certain class of customer or data, but a particular individual (say, a four-star general at the Pentagon) or a specific piece of data (such as the communication algorithms of a particular weapons system).
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