Netinfo Security ›› 2022, Vol. 22 ›› Issue (4): 77-85.doi: 10.3969/j.issn.1671-1122.2022.04.009

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Optimal Information Rate Calculation Based on a Class of Graph Access Structure

LYU Kaixin1, LI Zhihui1(), HEI Jiliao1, SONG Yun2   

  1. 1. School of Mathematics and Statistics, Shaanxi Normal University; Xi’an, 710119, China
    2. School of Computer Science, Shaanxi Normal University, Xi’an, 710119, China
  • Received:2022-01-13 Online:2022-04-10 Published:2022-05-12
  • Contact: LI Zhihui E-mail:lizhihui@snnu.edu.cn

Abstract:

Secret sharing provides a very effective way for key management and the information rate of access structure provides a theoretical guarantee for the design of efficient secret sharing scheme. In this paper, by using the relationship between access structure and connected graph, a class of access structure with 8 participants is transformed into a class of 63 graph access structures with 8 vertices, 9 edges and a maximum vertex degree of 3. The accurate value or upper and lower bounds of the optimal information rate of these 63 graph access structures are calculated by splitting construction method, entropy method, vertex degree theorem, decomposition construction method and weighted decomposition method. The accurate values of the optimal information rates of 30 graph access structures and the upper and lower bounds of the optimal information rates of the other 33 graph access structures are obtained.

Key words: graph access structure, optimal information rate, secret sharin scheme, decomposition of graphs

CLC Number: