Presentation 2018-10-11
On Information Gained from Pseudonymized Location Traces
Takao Murakami,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) Re-identification attacks for pseudonymized location traces have been widely studied to understand the risk of location privacy. The re-identification attack for pseudonymized traces can be regarded as biometric identification based on behavioral characteristics of users. However, no studies have evaluated the risk of re-identification by comparing it with the performance of biometric identification such as fingerprint identification and face identification, to our knowledge. In this paper, for more intuitive understanding of the risk of re-identification, we evaluate the BSE (Biometric System Entropy) of pseudonymized traces using the Foursquare dataset, and compare it with the BSE of fingerprint and face and password entropy of PINs.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) location privacy / pseudonymized trace / BSE / KL divergence
Paper # BioX2018-22
Date of Issue 2018-10-04 (BioX)

Conference Information
Committee BioX
Conference Date 2018/10/11(2days)
Place (in Japanese) (See Japanese page)
Place (in English) Nobumoto Ohama Memorial Hall
Topics (in Japanese) (See Japanese page)
Topics (in English) Biometrics, etc.
Chair Kazuhiko Sumi(AGU)
Vice Chair Hitoshi Imaoka(NEC) / Tetsushi Ohki(Shizuoka Univ.)
Secretary Hitoshi Imaoka(Fujitsu Labs.) / Tetsushi Ohki(Univ. of Electro-Comm.)
Assistant Norihiro Okui(KDDI Research) / Daishi Watabe(Saitama Inst. of Tech.)

Paper Information
Registration To Technical Committee on Biometrics
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) On Information Gained from Pseudonymized Location Traces
Sub Title (in English)
Keyword(1) location privacy
Keyword(2) pseudonymized trace
Keyword(3) BSE
Keyword(4) KL divergence
1st Author's Name Takao Murakami
1st Author's Affiliation National Institute of Advanced Industrial Science and Technology(AIST)
Date 2018-10-11
Paper # BioX2018-22
Volume (vol) vol.118
Number (no) BioX-236
Page pp.pp.19-23(BioX),
#Pages 5
Date of Issue 2018-10-04 (BioX)