Outer Message                             OSCORE Plaintext
  +-+-+---+--------+---------------+          +-------+
  |v|t|TKL|new code| Message ID    |          | code  |
  +-+-+---+--------+---------------+....+     +-------+-----......+
  | Token                               |     | Options (E)       |
  +--------------------------------.....+     +-------+------.....+
  | Options (IU)             |                | 0xFF  |
  .                          .                +-------+-----------+
  . OSCORE Option            .                |                   |
  +------+-------------------+                | Payload           |
  | 0xFF |                                    |                   |
  +------+------------+                       +-------------------+
  |  Ciphertext       |<---------\                      |
  |                   |          |                      v
  +-------------------+          |             +-----------------+
          |                      |             |   Inner SCHC    |
          v                      |             |   Compression   |
    +-----------------+          |             +-----------------+
    |   Outer SCHC    |          |                     |
    |   Compression   |          |                     v
    +-----------------+          |             +-------+
          |                      |             |RuleID |
          v                      |             +-------+-----------+
    +--------+             +------------+      |Compression Residue|
    |RuleID' |             | Encryption | <--  +----------+--------+
    +--------+-----------+ +------------+      |                   |
    |Compression Residue'|                     | Payload           |
    +-----------+--------+                     |                   |
    |  Ciphertext        |                     +-------------------+
    |                    |     
    +--------------------+