This IDC Government Insights report finds that general IT security spending will increase from $2.3 billion in FY15 to $2.7 billion in FY20, at a CAGR of 3.2%. Meanwhile, spending on IT elements related to national security and emergency services will increase from $3.7 billion in FY15 to $5.7 billion in FY20, at a CAGR of 9.3%. But there is more to the story than just spending numbers. "Within the U.S. federal government, the very nature of IT security is changing," said Shawn P. McCarthy, research director at IDC Government Insights. "At a time when security spending is reaching new heights, it's also apparent that the functions of cybersecurity, physical security, and national defense continue to merge. They are evolving into a tightly coupled market space — to the point where it's difficult to talk about defense and homeland security without talking about multiple cyber elements."
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