| Paper Abstract and Keywords |
| Presentation |
2006-07-21 14:15
Password-Authenticated Key Exchange for Multi-Party with Different Passwords Using a Constant Number of Rounds
Jeong Ok Kwon (Korea Univ./Kyushu Univ.), Kouichi Sakurai (Kyushu Univ.), Dong Hoon Lee (Korea Univ.) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
Password-authenticated key exchange (PAKE) for multi-party with different passwords
allows group users with different passwords to agree on a common session key by the help of a trusted server using their passwords only. In this setting, the users do not share a password between themselves but only with the server. The fundamental security goal of PAKE is security against dictionary attacks. In this paper, we present two in symmetric model and two in asymmetric model provably-secure protocols for this problem in the standard model under the DDH assumption; our first protocol in symmetric model is designed to provide forward secrecy and to secure against known-key attacks. The second protocol in symmetric model is designed to additionally provide key secrecy against the server. Our first protocol in asymmetric model is designed to provide forward secrecy and to secure against known-key attacks and server compromise attacks. The second protocol in asymmetric model is designed to additionally provide key secrecy against the server. Our all protocols require a constant number of rounds. Toward this goal, we recall some of the existing security notions for server-aided PAKE protocols in symmetric model and provide a formal definition of security for asymmetric model. To the best of our contribution, the new protocols are the first constant-round PAKE protocols for multi-party with different passwords along with a rigorous proof of security in the standard model per protocol. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
Cryptography / provable security, / group key exchange / password-authenticated key exchange / dictionary attack / round complexity / / |
| Reference Info. |
IEICE Tech. Rep., vol. 106, no. 176, ISEC2006-55, pp. 115-122, July 2006. |
| Paper # |
ISEC2006-55 |
| Date of Issue |
2006-07-14 (ISEC) |
| ISSN |
Print edition: ISSN 0913-5685 |
| Download PDF |
|
| Conference Information |
| Committee |
ISEC SITE IPSJ-CSEC |
| Conference Date |
2006-07-20 - 2006-07-21 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Okayama Univ. |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
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| Paper Information |
| Registration To |
ISEC |
| Conference Code |
2006-07-ISEC-SITE-IPSJ-CSEC |
| Language |
English |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
Password-Authenticated Key Exchange for Multi-Party with Different Passwords Using a Constant Number of Rounds |
| Sub Title (in English) |
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| Keyword(1) |
Cryptography |
| Keyword(2) |
provable security, |
| Keyword(3) |
group key exchange |
| Keyword(4) |
password-authenticated key exchange |
| Keyword(5) |
dictionary attack |
| Keyword(6) |
round complexity |
| Keyword(7) |
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| Keyword(8) |
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| 1st Author's Name |
Jeong Ok Kwon |
| 1st Author's Affiliation |
Kyushu Univresity (Korea Univ./Kyushu Univ.) |
| 2nd Author's Name |
Kouichi Sakurai |
| 2nd Author's Affiliation |
Kyushu Univresity (Kyushu Univ.) |
| 3rd Author's Name |
Dong Hoon Lee |
| 3rd Author's Affiliation |
Korea University (Korea Univ.) |
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| Speaker |
Author-1 |
| Date Time |
2006-07-21 14:15:00 |
| Presentation Time |
25 minutes |
| Registration for |
ISEC |
| Paper # |
ISEC2006-55 |
| Volume (vol) |
vol.106 |
| Number (no) |
no.176 |
| Page |
pp.115-122 |
| #Pages |
8 |
| Date of Issue |
2006-07-14 (ISEC) |