Delegated Path Validation
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Delegated Path Validation (DPV) is a method for offloading to a trusted server the work involved in validating a public key certificate.
Combining certificate information supplied by the DPV client with certificate path and revocation status information obtained by itself, a DPV server is able to apply complex validation policies that are prohibitive for each client to perform.
The requirements for DPV are described in RFC 3379.