Gj

Gj: I did not know that you could be so easily displeased, madam. bhe wept.

Sir Charles Grandison 2006

In this case, user u5 of m integers, where added [j] records the number executes the following protocol: of bundles that the elementary group Gj is added to.

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Even if users specify their intentions to number of keys in its parcel of Pk and to inform leave any service or the whole system altogether the other users in Gj. (The updated keys are multi - in the middle of pre-de fi ned period, they can still cast to the other users in Gj according to the key receive the service until the current subscription tree algorithm [4].)

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If 10 user ui, who is already in a group Gj, joins another 5 group G0j in the same parcel P, then the two groups 0 Gj and G0j become con fl icting and should be 1.8 2 2.2 2.4 2.6 2.8 3 assigned to di ff erent parcels.

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Gj; group Gu that is in many bundles, choose the F ½iŠ½jŠ ¼ false otherwise. smallest i of Bi can color with Ci.

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First, assign to each elementary group Gj tem so that any system user ui can securely multi - a security key to be shared by all the users of Gj. cast data items to any group G in the system.

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Secure Multicast: If a user does not know guaranteed to converge to an ideal state provided appropriate group keys to secure its message, its initial state is ideal. it has to encrypt the message using its individual When a user ui leaves a group Gj in a parcel Pk, key and forward it to the server.

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Similarly, when a user ui joins period expires. a group Gj in parcel Pk then only the key server KSk needs to update a number of keys in its parcel and to inform the other users in Gj. 9.

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Any Second, assign to the complement: Gj of each ele - reasonable solution for this problem needs to take mentary group Gj a security key to be shared by into account that the users can leave any elemen - every member of this complement.

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Then, S group has a unique identi fi er Gj, 0 6 j 6 m À 1. multicasts the encrypted keys to the corresponding The identi fi er for the elementary group that has holders of these keys.

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