DHS Automated Indicator Sharing (AIS)

The Department of Homeland Security’s (DHS) free Automated Indicator Sharing (AIS) capability enables the exchange of cyber threat indicators between the Federal Government and the private sector at machine speed. Threat indicators are pieces of information like malicious IP addresses or the sender address of a phishing email (although they can also be much more complicated).

AIS is a part of the Department’s effort to create an ecosystem where as soon as a company or federal agency observes an attempted compromise, the indicator will be shared in real time with all of its partners, protecting them from that particular threat. That means that adversaries can only use an attack once, which increases their costs and ultimately reduces the prevalence of cyber-attacks. While AIS won’t eliminate sophisticated cyber threats, it will allow companies and federal agencies to concentrate more on them by clearing away less sophisticated attacks.

https://www.us-cert.gov/ais