Cyber Defense of Federal Networks Act of 2015

[AI summary unavailable — showing source text] Cyber Defense of Federal Networks Act of 2015 Amends the Homeland Security Act of 2002 to require the Department of Homeland Security (DHS), in coordination with the Office of Management and Budget (OMB), to implement plans to: (1) detect, identify, and remove intruders in federal agencies' information systems; and (2) make advanced network security tools available for agencies to improve visibility of network activity to detect and mitigate intrusions and anomalous activity. Directs DHS to coordinate with the OMB to: (1) update government information security metrics to include measures of intrusion and incident detection and response times, and (2) display additional metrics about agency cybersecurity postures on federal government performance websites. Authorizes DHS, upon an agency's request, to operate and maintain technology that is deployed to agencies to diagnose and mitigate cyber threats and vulnerabilities. Requires DHS to regularly assess and require implementation of best practices for securing agency information systems and preventing data exfiltration. Redefines for purposes of DHS's national cybersecurity and communications integration center: (1) "cybersecurity ris…