+-------------+                                +-------------+
|             |################################|             |
|    Media    |------------------------ *----->|    Media    |
| Distributor |<----------------------*-|------| Distributor |
|      X      |#####################*#|#|######|      Y      |
|             |                     | | |      |             |
+-------------+                     | | |      +-------------+
   #  ^ |  #          HBH Key (XY) -+ | |         #  ^ |  #
   #  | |  #           E2E Key (B) ---+ |         #  | |  #
   #  | |  #           E2E Key (A) -----+         #  | |  #
   #  | |  #                                      #  | |  #
   #  | |  #                                      #  | |  #
   #  | |  *---- HBH Key (AX)    HBH Key (YB) ----*  | |  #
   #  | |  #                                      #  | |  #
   #  *--------- E2E Key (A)      E2E Key (A) ---------*  #
   #  | *------- E2E Key (B)      E2E Key (B) -------* |  #
   #  | |  #                                      #  | |  #
   #  | v  #                                      #  | v  #
+-------------+                                +-------------+
| Endpoint A  |                                | Endpoint B  |
+-------------+                                +-------------+