A strengthened security notion for password-protected secret sharing schemes

Shingo Hasegawa; Shuji Isobe; Jun Ya Iwazaki; Eisuke Koizumi; Hiroki Shizuya

doi:10.1587/transfun.E98.A.203

A strengthened security notion for password-protected secret sharing schemes

Shingo Hasegawa, Shuji Isobe, Jun Ya Iwazaki, Eisuke Koizumi, Hiroki Shizuya

MED - Office of Medical Education

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

Password-protected secret sharing (PPSS, for short) schemes were proposed by Bagherzandi, Jarecki, Saxena and Lu. In this paper, we consider another attack for PPSS schemes which is based on public parameters and documents. We show that the protocol proposed by Bagherzandi et al. is broken with the attack. We then propose an enhanced protocol which is secure against the attack.

Original language	English
Pages (from-to)	203-212
Number of pages	10
Journal	IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Volume	E98A
Issue number	1
DOIs	https://doi.org/10.1587/transfun.E98.A.203
Publication status	Published - 2015 Jan 1

Keywords

Password-protected secret sharing
Simulation-sound non-interactive zero-knowledge
Twin ElGamal encryption

ASJC Scopus subject areas

Signal Processing
Computer Graphics and Computer-Aided Design
Electrical and Electronic Engineering
Applied Mathematics

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10.1587/transfun.E98.A.203

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AU - Isobe, Shuji

AU - Iwazaki, Jun Ya

AU - Koizumi, Eisuke

AU - Shizuya, Hiroki

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KW - Password-protected secret sharing

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KW - Twin ElGamal encryption

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A strengthened security notion for password-protected secret sharing schemes

Abstract

Keywords

ASJC Scopus subject areas

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