https://www.cyber.mil/pki-pke/interoperability Provides updates to DoD-approved external PKIs and other PKI interoperability-related information. https://dl.dod.cyber.mil/wp-content/uploads/pki-pke/zip/unclass-dod_approved_external_pkis_trust_chains.zip tag:www.cyber.mil,2026:pki-interop.2 Wed, 04 Mar 2026 15:01:00 GMT This zip file contains certificate trust chains for DoD Approved External PKIs. Version 11.5 adds a rekeyed Department of Health and Human Services (HHS) subordinate Certification Authority (CA) under the Entrust Shared Service Provider (SSP )and removes expired CAs. https://dl.dod.cyber.mil/wp-content/uploads/pki-pke/pdf/unclass-dod_approved_external_pkis_master_document.pdf tag:www.cyber.mil,2026:pki-interop.1 Wed, 04 Mar 2026 15:00:00 GMT This document provides Certification Authority (CA) certificate trust chain and assurance level information for all Department of Defense (DoD) approved Public Key Infrastructures (PKIs). Version 11.5 adds information for a rekeyed Department of Health and Human Services (HHS) subordinate CA under the Entrust Shared Service Provider (SSP) and removes expired infrastructure.