| 摘要 |
A verification system is used to deny a data processing unit (C) unauthorised access to data stored in a data storage medium. The verification system includes a verification program (V) which causes the data processing unit to generate a first authentification code and an authorisation code, bearing a first predetermined relationship to the first authentification code. The verification program enables the data processing unit to access the data in the data storage medium provided a second authentification code, bearing a second predetermined relationship to the first authentification code is input to the data processing unit. A remote processor (P) derives the second authentification code from the authorisation code. The second authorisation code can be received from, and the authorisation code supplied to, the remote processor (P) over a telephone link. <IMAGE> |
