| 摘要 |
<p>A security device (warden) for data communications networks is disclosed. It is a new component in a Message Handling System (MHS), which performs all the X.400 security functions, while not performing any other X.400 functions. This allows a MHS to be constructed in which the X.400 components provide all of the electronic mail functions, except security, while the warden provides all of the security functions. The warden (200) sits in an association, connected to the two MHS components (210, 220) at each end of that association and it protects the non-secure MHS component (210), while the secure component (220) can be either non-secure but protected by another warden or a component which implements the security functions directly. The warden acts with and reacts to one component as if it were the other. This means the MHS components do not notice that there is a non-X.400 component in the network. <IMAGE> <IMAGE></p> |
