Revised overhead table

draft-ietf-core-oscore-key-update.md

@@ -905,16 +905,19 @@ Each of the two KUDOS messages displays a small communication overhead. This is
 Assuming nonces of the same size in both messages of the same KUDOS execution, this results in the following minimum, typical, and maximum communication overhead, when considering a nonce with size 1, 8, and 16 bytes, respectively. All the indicated values are in bytes.
 
 ~~~~~~~~~~~
-+-------+-----------------+-----------------+
-| Nonce | Overhead of one | Overhead of one |
-| size  | KUDOS message   | KUDOS execution |
-+-------+-----------------+-----------------+
-| 1     | 3               | 6               |
-+-------+-----------------+-----------------+
-| 8     | 10              | 20              |
-+-------+-----------------+-----------------+
-| 16    | 18              | 36              |
-+-------+-----------------+-----------------+
++-------+---------------------------+---------------------------+
+|       | Forward message flow      | Reverse message flow      |
++-------+---------+---------+-------+---------------------------+
+| Nonce | First   | Second  | Total | First   | Second  | Total |
+| size  | KUDOS   | KUDOS   |       | KUDOS   | KUDOS   |       |
+|       | message | message |       | message | message |       |
++-------+---------+---------+-------+---------+---------+-------+
+| 1     | 3       | 3       | 6     | 3       | 4       | 7     |
++-------+-------------------+-------+---------+---------+-------+
+| 8     | 10      | 10      | 20    | 10      | 11      | 21    |
++-------+---------+-----------------+---------+---------+-------+
+| 16    | 18      | 18      | 36    | 18      | 19      | 37    |
++-------+---------+-----------------+---------+---------+-------+
 ~~~~~~~~~~~
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