Paper Abstract and Keywords |
Presentation |
2013-07-19 09:10
A Note on a Construction of Gateway Threshold Password-based Authenticated Key Exchange Yukou Kobayashi, Naoto Yanai, Takashi Nishide, Eiji Okamoto (Univ. of Tsukuba) ISEC2013-35 SITE2013-30 ICSS2013-40 EMM2013-37 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
Password-based authenticated key exchange (PAKE) allowing users to utilize passwords as secret information is suitable for cloud services which are available anywhere. Meanwhile, European Network and Information Security Agency (ENISA) has pointed out an existence of a malicious provider as the most serious threat. This threat for PAKE corresponds to the existences of malicious servers, and gateway threshold password-based authenticated (GTPAKE) by Abdalla et al. is recognizable as an approach against such a problem: in particular, revealing a password against the servers can be overcome by encrypting the password in a threshold encryption scheme. However, as an actual scenario against the provider, there are more malicious actions, e.g., manipulations of shares stored in the servers. Hence, only concealing the password is insufficient. In this paper, we consider the security required in which a malicious provider exists, and propose a GTPAKE under the definition. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Password-based authenticated key exchange (PAKE) / Gateway threshold password-based authenticated key exchange (GTPAKE) / Distributed key generation (DKG) / Set Password-based Chosen-basis Computational Diffie-Hellman (SPCCDH) assumption / Password-based Chosen-basis Decisional Diffie-Hellman (PCDDH) assumption / / / |
Reference Info. |
IEICE Tech. Rep., vol. 113, no. 135, ISEC2013-35, pp. 247-254, July 2013. |
Paper # |
ISEC2013-35 |
Date of Issue |
2013-07-11 (ISEC, SITE, ICSS, EMM) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
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ISEC2013-35 SITE2013-30 ICSS2013-40 EMM2013-37 |
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