Ideal secret sharing schemes on graph-based $۳$-homogeneous access structures
Publish place: Transactions on Combinatorics، Vol: 10، Issue: 2
Publish Year: 1400
نوع سند: مقاله ژورنالی
زبان: English
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JR_COMB-10-2_003
تاریخ نمایه سازی: 14 اردیبهشت 1400
Abstract:
The characterization of the ideal access structures is one of the main open problems in secret sharing and is important from both practical and theoretical points of views. A graph-based $۳-$homogeneous access structure is an access structure in which the participants are the vertices of a connected graph and every subset of the vertices is a minimal qualified subset if it has three vertices and induces a connected graph. In this paper, we introduce the graph-based $۳-$homogeneous access structures and characterize the ideal graph-based $۳$-homogeneous access structures. We prove that for every non-ideal graph-based $۳$-homogeneous access structure over the graph $G$ with the maximum degree $d$ there exists a secret sharing scheme with an information rate $\frac{۱}{d+۱}$. Furthermore, we mention three forbidden configurations that are useful in characterizing other families of ideal access structures.
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Authors
Shahrooz Janbaz
Electrical and computer faculty, Malek Ashtar University of Technology, Tehran, Iran
Bagher Bagherpour
Department of Mathematics and Cryptography, Malek Ashtar University of Technology, Isfahan, Iran
Ali Zaghian
Department of Mathematics and Cryptography, Malek Ashtar University of Technology, Isfahan, Iran