An act to improve cybersecurity in the United States through enhanced sharing of information about cybersecurity threats, and for other purposes.

[AI summary unavailable — showing source text] Cybersecurity Information Sharing Act of 2015 Requires the Director of National Intelligence (DNI), the Department of Homeland Security (DHS), the Department of Defense (DOD), and the Department of Justice (DOJ) 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; (2) the sharing of unclassified indicators with the public; and (3) the sharing of cybersecurity threats with entities to prevent or mitigate adverse effects. Permits private entities to monitor, and operate defensive measures to detect, prevent, or mitigate cybersecurity threats or security vulnerabilities on: (1) their own information systems; and (2) with authorization and written consent, the information systems of other private or government entities. Allows entities to share and receive indicators and defensive measures with other entities or the federal government. Requires the federal government and entities monitoring, operating, or sharing indicators or defensive measures: (1) to utilize security controls …