| 摘要 |
The proposed communication network consists of one center unit (C) cand many group of units. The center unit (C) transmits identical copies of a sequence (11) of random numbers to at least one unit (A) of each group wherein all units (A,B)of each group secretly share a key and its position keys wherein secret key is a sequence of random numbers and position key (12,13,17,18) is a sequence of random positions of at least one random number in the shared secret sequence (11) of random numbers. At least one position key(12,13) is applied on the received sequence (11) of random numbers by each unit of a group to extract identical key which will remain secret to the units (A and B) of other groups and also to the center unit (C). Similarly each time the center unit (C) transmits identical copies of new sequence (11) of random numbers to at least one unit (AorB) of each group. Applying the same secret position key (12,17,13,18) on each received sequence units (11) of the same group extract identical key (14,15,19,20). Authentication of the extracted key can also be accomplished by one authentication key which will initialize the process of authentication. |
