Abstract
AbstractIn a compartmented access structure, there are disjoint participants C 1,…,C m . The access structure consists of subsets of participants containing at least t i from C i for i = 1,…,m, and a total of at least t 0 participants. Tassa [2] asked: whether there exists an efficient ideal secret sharing scheme for such an access structure? Tassa and Dyn [5] realized this access structure with the help of its dual access structure. Unlike the scheme constructed in [5], we propose a direct solution here, in the sense that it does not utilize the dual access structure. So our method is compact and simple.KeywordsSecret sharingCompartmented access structureIdeality
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