Presentation 2018-09-07
Proposal of Commercial Use of Social Number with Special Device
Kento Iijima, Ryuya Uda,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) In recent years, the use of private numbers has been considered due to the appearance of the My Number system, but a practical system has not been constructed yet, and an accurate attribute can be obtained by presenting an identification card such as an analog My Number card or a driver's license A method of acquiring information is common. However, when presenting an analog certificate, there are many cases where attribute information beyond necessity is stated, which causes excessive leakage of attribute information and excessive transmission. In this proposal, a random number and a hash function are used for the My Number and a third party generates a value that changes from communication to communication so that the third party can not identify the individual from the inferable value of the My Number and the value itself. Private enterprises propose a system that can confirm the authenticity of user's information to the government using that value. By using a value that varies for each communication, unlike those that are unique, such as the public key used in the certificate method, that are not easy to change, in addition to the attribute information that was sent, it is linked to the attribute information There is no information to be collected, and the risk of being collected from a plurality of information sources can be reduced. Therefore, it is possible to solve the problem of redundancy of my number and personal information leakage and excessive transmission of attribute information which is not essential in private use of My number system. In this research, we implement the verification part of our method and evaluate its usefulness based on its processing speed. From there, consider the risks to improve processing speed and possible attacks and consider measures.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) mynunber / Private use / Attribute
Paper # ISEC2018-52
Date of Issue 2018-08-31 (ISEC)

Conference Information
Committee ISEC
Conference Date 2018/9/7(1days)
Place (in Japanese) (See Japanese page)
Place (in English) Kikai-Shinko-Kaikan Bldg.
Topics (in Japanese) (See Japanese page)
Topics (in English)
Chair Atsushi Fujioka(Kanagawa Univ.)
Vice Chair Shiho Moriai(NICT) / Shoichi Hirose(Univerisity of Fukui)
Secretary Shiho Moriai(Tokai Univ.) / Shoichi Hirose(NICT)
Assistant Kazumasa Omote(University of Tsukuba) / Yuuji Suga(IIJ)

Paper Information
Registration To Technical Committee on Information Security
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Proposal of Commercial Use of Social Number with Special Device
Sub Title (in English)
Keyword(1) mynunber
Keyword(2) Private use
Keyword(3) Attribute
1st Author's Name Kento Iijima
1st Author's Affiliation Tokyo University of Technology(Tokyo Univ. of Tech.)
2nd Author's Name Ryuya Uda
2nd Author's Affiliation Tokyo University of Technology(Tokyo Univ. of Tech.)
Date 2018-09-07
Paper # ISEC2018-52
Volume (vol) vol.118
Number (no) ISEC-212
Page pp.pp.15-22(ISEC),
#Pages 8
Date of Issue 2018-08-31 (ISEC)