Multiplex communications – Network configuration determination
Reexamination Certificate
2011-06-07
2011-06-07
Sam, Phirin (Department: 2419)
Multiplex communications
Network configuration determination
C713S171000
Reexamination Certificate
active
07957320
ABSTRACT:
The invention relates to a method for changing a group key GK for a secure data exchange in a group of network elements P1. . . Pn(n=2, 3, . . . ) in a network system having a closed peer-to-peer configuration and a virtual synchronism supporting group communication protocol in a communication layer of a system architecture of the network system, wherein in the case of a change in a composition of the group of network elements P1. . . Pn, caused by the join of a new network element Pn+1into the group of network elements P1. . . Pnor by the leave of a network element Pv(1≦v≦n) from the group of network elements P1. . . Pn, a group key renewal, in which a network element Pi* (1≦i≦n) selected from the group of network elements P1. . . Pngenerates a new group key GKneu, is carried out and the new group key GKneuis transferred from the selected network element Pito all the remaining network elements Pk(1≦k≦n, k≠i) of the group of network elements P1. . . Pnin the changed composition, which the selected network element Pi* achieves by carrying out a key exchange with all the remaining network elements Pkin accordance with the Diffie-Hellman principle in order to transfer the new group key GKneu.
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König Hartmut
Liu Fuwen
Brandenburgishe Technishe Universitat Cottbus
Sam Phirin
Smith Patent Office
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