# Federal Public Key Infrastructure **Aliases:** FPKI; Federal PKI **Entity class:** Government-wide cryptographic trust framework ## Definition The **Federal Public Key Infrastructure (FPKI)** supplies the federal trust framework for digital certificates and public-private key pairs. The Federal Common Policy CA is a federal trust anchor; the Federal Bridge CA enables interoperability among federal and partner PKIs through cross-certification rather than serving as the root for every credential. ## Relationships - **technology:** [[wiki/Public Key Infrastructure|PKI]]. - **credentials:** [[wiki/PIV and CAC|PIV and CAC]] and PIV-Interoperable credentials. - **governed by:** the Federal PKI Policy Authority and Federal PKI Management Authority. - **enables:** [[wiki/Federated Trust Fabric|Federated Trust Fabric]] and [[wiki/Digital Signature Chain|digital-signature chains]]. ## Sources / Provenance - [GSA — Federal PKI governance and policies](https://www.idmanagement.gov/fpki/) - [GSA — Federal PKI 101](https://www.idmanagement.gov/university/fpki/)