,-------.                                     
|Client |  ,------------------------.         
|-------|  |Authentication Interface|         
|request|--|------------------------|         
`-------'  `------------------------'         
                       |                      
                       |                      
                  ,-----------.               
                  |Mechanismen|               
                  |-----------|               
                  `-----------'               
                       |                      
   ,-----------------------------------------.
   |Methoden / Password Verification Services|
   |-----------------------------------------|
   `-----------------------------------------'