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Extending Brickell-Davenport theorem to non-perfect secret sharing schemes

机译:将Brickell-Davenport定理扩展到非完美秘密共享方案

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摘要

One important result in secret sharing is the Brickell-Davenport theorem: every ideal perfect secret sharing scheme defines a matroid that is uniquely determined by the access structure. We present a generalization of the Brickell-Davenport theorem to the general case, in which non-perfect schemes are also considered. After analyzing that result under a new point of view and identifying its combinatorial nature, we present a characterization of the (not necessarily perfect) secret sharing schemes that are associated with matroids. Some optimality properties of such schemes are discussed.
机译:秘密共享的一个重要结果是Brickell-Davenport定理:每个理想的完美秘密共享方案都定义了由访问结构唯一确定的拟阵。我们将Brickell-Davenport定理推广到一般情况,其中还考虑了非完美方案。在以新的观点分析了该结果并确定了其组合性质之后,我们介绍了与类拟阵相关的(不一定是完美的)秘密共享方案的特征。讨论了这种方案的一些最优性。

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