| 摘要 |
<p>A secure teleconferencing method for a key management system is shown. This method directly establishes a secure teleconference among a number of terminals without the intervention of a certifying authority. The terminals (A-D) of this system have been previously certified by a common certification authority. Upon detection of a secure teleconference, the terminals orient themselves in a master/slave (1-16,22,23) configuration. The terminals exchange certification messages (24-43,45). As a result, each terminal determines the identity of the other terminals (44,46). Under the supervision of the master terminal, the terminals establish a single session, session key which permits secure communication among the terminals (47-58). A new session key is randomly generated for each teleconference call. A minimum number of messages is exchanged to establish the secure teleconference.</p> |
