Presentation 2019-07-26
A Theoretical Study of a Composite Fail-safe Design with Secret Sharing Schemes for Railway Signalling Systems
Takashi Toyama,
PDF Download Page PDF download Page Link
Abstract(in Japanese) (See Japanese page)
Abstract(in English) As well-known, fail-safe computers are used in railway signalling systems. The fail-safe computers have functions to unify the outputs of multiple CPUs using the voter/comparator circuit with asymmetric failure features. However, the fail-safe computers are limited in processing performance and require the specific hardware. Hence, it is needed to study technologies to realize the fail-safety with general computers. We propose a composite fail-safe design in which conventional fail-safe computers and general computers are connected via a network, targeting the signalling system consisting of many terminals for controlling field devices and a few centralized hosts. In this study, after clarifying the problems in the majority voting over the network, we propose to apply the secret sharing scheme to the transmission system from the centralized host to the terminals for the solution.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Railway Signalling / Fail-safe / Secret Sharing Schemes / Cloud Computing
Paper # CPSY2019-39,DC2019-39
Date of Issue 2019-07-17 (CPSY, DC)

Conference Information
Committee CPSY / DC / IPSJ-ARC
Conference Date 2019/7/24(3days)
Place (in Japanese) (See Japanese page)
Place (in English) Kitami Civic Hall
Topics (in Japanese) (See Japanese page)
Topics (in English) Parallel, Distributed and Cooperative Processing Systems and Dependable Computing
Chair Hidetsugu Irie(Univ. of Tokyo) / Satoshi Fukumoto(Tokyo Metropolitan Univ.) / Hiroshi Inoue(Kyushu Univ.)
Vice Chair Michihiro Koibuchi(NII) / Kota Nakajima(Fujitsu Lab.) / Hiroshi Takahashi(Ehime Univ.)
Secretary Michihiro Koibuchi(Nagoya Inst. of Tech.) / Kota Nakajima(Hokkaido Univ.) / Hiroshi Takahashi(Nihon Univ.) / (Chiba Univ.)
Assistant Eiji Arima(Univ. of Tokyo) / Shugo Ogawa(Hitachi)

Paper Information
Registration To Technical Committee on Computer Systems / Technical Committee on Dependable Computing / Special Interest Group on System Architecture
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) A Theoretical Study of a Composite Fail-safe Design with Secret Sharing Schemes for Railway Signalling Systems
Sub Title (in English)
Keyword(1) Railway Signalling
Keyword(2) Fail-safe
Keyword(3) Secret Sharing Schemes
Keyword(4) Cloud Computing
1st Author's Name Takashi Toyama
1st Author's Affiliation Railway Technical Research Institute(RTRI)
Date 2019-07-26
Paper # CPSY2019-39,DC2019-39
Volume (vol) vol.119
Number (no) CPSY-147,DC-148
Page pp.pp.235-240(CPSY), pp.235-240(DC),
#Pages 6
Date of Issue 2019-07-17 (CPSY, DC)