Security of Join and Leave Operations Sample Clauses

Security of Join and Leave Operations. Dynamic group operations enables group key agreement protocols to be more efficient during re-generation of group keys. In order to overcome security weaknesses stated in [19], a protocol must ensure forward and backward confidentiality properties. Forward confidentiality property assures that further group keys cannot be computed by a par- ticipant who has left the group. Conversely, backward confidentiality feature warrants that previous group keys cannot be computed by recently joined participants. In the following sections, we prove that Leave and Join operations in B-GKAP provide the same security features as [13] assures. Prior to applying dynamic group operations, let the participant group be Ugrp = {U1, U2, U3, . . . , UN } and the group key be: CK = ((gt1t2+...+ti−1ti+titi+1+...+tN t1 )modp)modq)
Sample 1
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