Cybersecurity: Implementation of the 2015 Information Sharing Act

Nearly a decade after its passage, the Cybersecurity Information Sharing Act of 2015 continues to play a pivotal role in how cyber threat data is exchanged across federal and nonfederal entities. This GAO snapshot reveals that while agencies have met the law’s requirements—including privacy protections and information classification—barriers to timely and effective sharing remain. Tools developed under the act, like automated data sharing platforms, have helped, but challenges in declassification and accessibility persist. As the act approaches its sunset date in 2025, the findings highlight both its impact and the ongoing need for adaptive, secure information exchange strategies.