The DoD DIB Opt-in Pilot (Defense Industrial Base (DIB) Exploratory Cybersecurity Initiative) leveraged the DoD DIB Cyber Security/Information Assurance Activities PIA  and established procedures and agreements with DIB participants.
During the DIB Opt-In Pilot, DoD shared classified indicators associated with cyber threat countermeasure capabilities directly with commercial service providers (CSPs) in order to protect information on DIB company networks. The DIB Opt-In Pilot focused on two cyber threat countermeasures: 1) the ability to block Domain Name System (DNS) traffic to malicious domains (referred to as DNS Sinkholing), and 2) e-mail filtering that would include quarantining incoming infected messages.
In May 2012, the U.S. Government established the Pilot as an ongoing voluntary program, originally known as the Joint Cybersecurity Services Program (JCSP), and now as the Enhanced Cybersecurity Services (ECS) program. In this program, DHS communicates with participating commercial Internet service providers directly, while DOD still serves as the point of contact for participating DIB contractors.