FIELD: data processing.
SUBSTANCE: invention relates to decentralized distribution of key information. Method of decentralized distribution of key information using an attribute-based encryption policy reduces the delay time owing to using the same group key with all group members, so there is no delay in transmitting data. Use of keys storage resources is minimized by using a flat table method using an attribute-based encryption policy. That requires storing only 2logn for n participants in a subgroup controller.
EFFECT: technical result is wider range of means.
1 cl, 3 dwg
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