ECA Certificates for DoD Access by IdenTrust (part of HID Global) are designed for conducting business with the Department of Defense. ECA certificates are segregated by assurance levels, determined by the type of identity validation conducted by the issuing Certification Authority and the device used to store the certificate. Each DoD agency program requires specific assurance level certificates. Once you select BUY NOW, you will be directed to the Certificate Selection Wizard to assist in choosing the correct certificate type for the DoD agency or agencies you interact with.