Method and circuit arrangement for the distribution of keys on key devices

Abstract

Abstract For the coded transmission of messages between terminals (DE1, DE2) via a communication network, corresponding keys (S) are transmitted from a key distribution centre (SVZ) to the key devices (SG) via the communication network itself. The key distribution centre (SVZ) generates a data field (DF) which is provided with a key identification (SK), key device identifications (GK) allocated to the key devices and with key fields (SF). The key fields (SF) contain the actual keys (S), check characters (P) and other characters which define the time of validity of the key (S1). After the recognition of the key identification (SK) and the corresponding key device identification (GK), the corresponding keys (S) are stored in the key devices. <IMAGE>

Inventors

• 👤 Walter Dipl.-Ing. Rauch
• 👤 Kurt Grenzebach
• 👤 Helmut Thenert

Bibliographic Details