The U$.$S$.$ Department of Homeland Security $($DHS$)$ provides an automated indicator sharing $($AIS$)$ service that allows for the federal government and private sector organizations to share threat data in real time. The AIS service uses open source protocols and standards to exchange this information. Which of the following standards does the AIS service use?

HTML and HTTPS

SFTP and XML

STIX and TRIX

STIX and TAXII