BSD Software Development RIPE NCC RIPE NCC OpenBSD This document specifies a Canonical Cache Representation (CCR) content type for use with the Resource Public Key Infrastructure (RPKI). CCR is a Distinguished Encoding Rules (DER) encoded data interchange format which can be used to represent various aspects of the state of a validated RPKI cache at a particular point in time. The CCR profile is a compact and versatile format, well-suited for a variety of applications, for example, audit trails, analytics pipelines, and validated payload dissemination.