+----------------------------------+
| EnvelopedData                    |
| [RFC5652], Section 6             |
| +------------------------------+ |
| | SignedData                   | |
| | [RFC5652], Section 5         | |
| | +--------------------------+ | |
| | | AsymmetricKeyPackage     | | |
| | | [RFC5958]                | | |
| | | +----------------------+ | | |
| | | | private key          | | | |
| | | +----------------------+ | | |
| | +--------------------------+ | |
| +------------------------------+ |
+----------------------------------+