+-----------------+   request message    +------------+
|        |        |    with extended     |            |
|        |        |     token length     |            |
|    .-<-+->------|--------------------->|------.     |
|   _|_           |                      |      |     |
|  /   \ stored   |                      |      |     |
|  \___/ state    |                      |      |     |
|    |            |                      |      |     |
|    '->-+-<------|<---------------------|------'     |
|        |        |     Reset message    |            |
|        v        |   with only message  |            |
+-----------------+    ID echoed back    +------------+
      Client                                 Server