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Related Experiment Video

Updated: Mar 12, 2026

A Tactile Automated Passive-Finger Stimulator TAPS
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Novel Threshold Changeable Secret Sharing Schemes Based on Polynomial Interpolation.

Lifeng Yuan1,2, Mingchu Li1,2, Cheng Guo1,2

  • 1School of Software Technology, Dalian University of Technology, Dalian, 116620, China.

Plos One
|October 30, 2016
PubMed
Summary

This study introduces improved dealer-free threshold changeable secret sharing schemes. These schemes enhance security and efficiency by safely adjusting thresholds using polynomials and one-way functions.

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Area of Science:

  • Cryptography
  • Information Security
  • Computer Science

Background:

  • Threshold changeable secret sharing schemes require threshold adjustments due to evolving security needs.
  • Existing schemes by Zhang et al. (2012) have limitations including restricted thresholds, high storage, and computational overhead.
  • Departing personnel pose security risks to distributed secret shadows.

Purpose of the Study:

  • To propose two novel dealer-free threshold changeable secret sharing schemes.
  • To overcome the limitations of previous threshold changeable secret sharing schemes.
  • To ensure secure and efficient threshold adjustments in secret sharing.

Main Methods:

  • Construction of polynomials for updating secret shadows.
  • Utilization of two-variable one-way functions to prevent collusion attacks.
  • Development of a secure information storage method for the combiner.

Main Results:

  • The proposed schemes allow for safe and flexible threshold adjustments.
  • The schemes address limitations of prior work concerning storage and computation.
  • Enhanced resistance against collusion attacks is demonstrated.

Conclusions:

  • The developed dealer-free schemes offer a more practical solution for threshold changeable secret sharing.
  • The integration of polynomials and one-way functions improves security and efficiency.
  • These advancements are crucial for dynamic security environments.