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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/12841

Title: An r-Hiding Revocable Group Signature Scheme: Group Signatures with the Property of Hiding the Number of Revoked Users
Authors: Emura, Keita
Miyaji, Atsuko
Omote, Kazumasa
Issue Date: 2014-06-01
Publisher: Hindawi Publishing Corporation
Magazine name: Journal of Applied Mathematics
Volume: 2014
Start page: Article ID 983040
DOI: 10.1155/2014/983040
Abstract: If there are many displaced workers in a company, then a person who goes for job hunting might not select this company. That is, the number of members who quit is quite negative information. Similarly, in revocable group signature schemes, if one knows (or guesses) the number of revoked users (say 𝑟), then one may guess the reason behind such circumstances, and it may lead to harmful rumors. However, no previous revocation procedure can achieve hiding 𝑟. In this paper, we propose the first revocable group signature scheme, where 𝑟 is kept hidden, which we call 𝑟-hiding revocable group signature. To handle this property, we newly define the security notion called anonymity with respect to the revocation which guarantees the unlinkability of revoked users.
Rights: Journal of Applied Mathematics, Volume 2014 (2014), Article ID 983040, 14 pages. http://dx.doi.org/10.1155/2014/983040 Copyright © 2014 Keita Emura et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
URI: http://hdl.handle.net/10119/12841
Material Type: publisher
Appears in Collections:b10-1. 雑誌掲載論文 (Journal Articles)

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