资料：SECMACE: Scalable and Robust Identity and Credential Infrastructure in Vehicular Communication

https://datatracker.ietf.org/meeting/102/materials/slides-102-irtfopen-panos-papadimitratos-anrp-talk-secmace-scalable-and-robust-identity-and-credential-infrastructure-in-vehicular-communication-00

车端在LTCA签发长期证书，从PCA签发假名证书，通过RCA之间的交叉信任实现full chain trust。

LTCA跟PCA签发的证书比较类似MIPv6里的家乡地址与转交地址，问题在于RCA交叉信任的mesh结构。