To improve cybersecurity in the United States through enhanced sharing of information about cybersecurity threats, to amend the Homeland Security Act of 2002 to enhance multi-directional sharing of information related to cybersecurity risks and strengthen privacy and civil liberties protections, and for other purposes.

[AI summary unavailable — showing source text] Protecting Cyber Networks Act Amends the National Security Act of 1947 to require the Director of National Intelligence (DNI) to develop and promulgate procedures to promote: (1) the timely sharing of classified and declassified cyber threat indicators in possession of the federal government with private entities, non-federal government agencies, or state, tribal, or local governments; and (2) the sharing of imminent or ongoing cybersecurity threats with such entities to prevent or mitigate adverse impacts. Requires the procedures to provide for: (1) notification to entities when the federal government has shared indicators in error or in contravention of law; and (2) the federal government, prior to sharing indicators, to remove personal information of, or information identifying, a specific person not directly related to a cybersecurity threat. Permits private entities to monitor or operate defensive measures to prevent or mitigate cybersecurity threats or security vulnerabilities, or to identify the source of a threat, on: (1) their own information systems; and (2) with written authorization, the information systems of other private or government entities. Allows non-federal ent…