The Department of Homeland Security is poised to ditch all records from a controversial network monitoring system called Einstein that are at least three years old, but not for security reasons.
DHS reasons the files -- which include data about traffic to government websites, agency network intrusions and general vulnerabilities -- have no research significance.
http://www.nextgov.com/cybersecurity/2014/11/dhs-set-destroy-governmentwide-network-surveillance-records/99737/--------------------------------------------------------------------------------