| 摘要 |
A communication network with at least two terminals (A, B) and at least one central unit (C) for the management of codes (K), in which a code is disclosed (KAC, KBC) between each of the two terminals (A, B) and the central unit (C), with which the information to be secured can be transmitted between the both terminals (A, B) and the central unit (C) in a secure manner. Furthermore, a code (KAB) is transmitted from the central unit (C) to the both terminals (A, B), using the codes (KAC, KBC), by means of which information to be secured may be securely transmitted between the both terminals (A, B).
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