| The roadwarrior <b>carol</b>, possessing a certificate issued by the | |
| Research CA, tries to set up a tunnel to gateway <b>moon</b>. | |
| The Research CA's certificate is signed by the Sales CA and | |
| the Sales CA's certificate in turn is signed by the Research CA. | |
| This leads to an endless trust path loop but which is aborted by | |
| <b>moon</b> when the path level reaches a depth of 7 iterations. |