The U.S. government is enlisting the help of tech companies, including Amazon.com Inc., Microsoft Corp. and Google, to bolster the country’s critical infrastructure defenses against cyber threats after a string of high-profile attacks.

The Department of Homeland Security, on Thursday, is formally unveiling the initiative called the Joint Cyber Defense Collaborative. The effort will initially focus on combating ransomware and cyberattacks on cloud-computing providers, said Jen Easterly, director of the DHS’s Cybersecurity and Infrastructure Security Agency. Ultimately, she said, it aims to improve defense planning and information sharing between government and the private sector. Creation of the Joint Cyber Defense Collaborative follows high-profile cyberattacks on critical U.S. infrastructure.

Read more: WSJ