A method at a computing device within an Intelligent Transportation System (ITS), the method including: receiving a first message, the first message including at least tailoring information for a first ITS endpoint and intended journey details for the first ITS endpoint; storing all or a subset of data from the first message; obtaining a full certificate revocation list; creating a tailored certificate revocation list based on data in the first message and the full certificate revocation list, the tailored certificate revocation list containing certificates or identifiers of certificates for ITS endpoints that may be encountered by the first ITS endpoint when navigating a route provided in the intended journey details; and providing the tailored certificate revocation list to the first ITS endpoint.