+-----+ +--------+ | KTA | | PKI TA | +-----+ +--------+ | | | Signs | Signs | | +-------------+ V | | +----+ V V | CA | +-----+ +-----+ +----+ | KSA | | KDA | | +-----+ +-----+ | Signs | | | | Signs & | Optionally +---------------+ | Encrypts | Signs | | | | V V | | +-------------+ +-------------+ | V | Certificate | | Certificate | +---|-------------+ +-------------+ | Revocation | | V | CMS Content | List | | +-------------+ | Types +-------------+ | | Key Package | | | +-------------+ | +-----------------+