Service Specific Permissions and Security Guidelines for Connected Vehicle Applications
The SAE J2945/x series of standards define a set of applications that among other things use messages from the J2735 message set dictionary. Authenticity and integrity of the communications for these applications are ensured using digital signatures and IEEE 1609.2 digital certificates, which also indicate the permissions of the senders using Provider Service Identifiers (PSID) and Service Specific Permissions (SSPs). The PSID is associated with an application specification that unambiguously describes how to build interoperable instances of that application. The SSP defined in that application specification is the means by which that application can express state dependent permissions to engage is particular subsets of the activities specified therein.