| Presentation | 2017-11-21 A Study on the Security of Dynamic Multi-Cast Key Distribution Protocol After Static Secret Keys Revealed Masahiro Matsui, Yuki Okano, Reo Yoshida, Tetsutaro Kobayashi, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The security that an adversary can not guess the exchanged key after static secret key leaking is called Post Compromise Security(PCS). The key exchange protocol which has PCS is Signal, which is used on some chat applications and makes the communication encrypted between one end-user and another end-user. However, if N users try end to end encryption using this protocol on full-mesh topology network, the computational cost for one user will increase at $O(N)$. Then, there is a Dynamic Multi-Cast Key Distribution(DMKD) Protocol that some users can exchange a key on star topology network which the server is central. On that protocol, server can not know the key. On that protocol the increasing the computational cost due to users increase is constant($O(1)$). On this paper, our goal is to make DMKD protocol with PCS, and we have done to define the DMKD security with PCS(PCS-DMKD security), and we propose the new DMKD protocol which probably has partial PCS-DMKD security. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Dynamic Multi-Cast Key Distribution Protocol / End to End Encryption / Static Secret Key / Leakage / Security |
| Paper # | ICSS2017-43 |
| Date of Issue | 2017-11-13 (ICSS) |
| Conference Information | |
| Committee | ICSS |
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| Conference Date | 2017/11/20(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Beppu International Convention Center |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Information Communication System Security, etc. |
| Chair | Yoshiaki Shiraishi(Kobe Univ.) |
| Vice Chair | Takeshi Ueda(Mitsubishi Electric) / Hiroki Takakura(NII) |
| Secretary | Takeshi Ueda(Yokohama National Univ.) / Hiroki Takakura(NTT) |
| Assistant | Takahiro Kasama(NICT) / Akira Yamada(KDDI labs.) |
| Paper Information | |
| Registration To | Technical Committee on Information and Communication System Security |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on the Security of Dynamic Multi-Cast Key Distribution Protocol After Static Secret Keys Revealed |
| Sub Title (in English) | |
| Keyword(1) | Dynamic Multi-Cast Key Distribution Protocol |
| Keyword(2) | End to End Encryption |
| Keyword(3) | Static Secret Key |
| Keyword(4) | Leakage |
| Keyword(5) | Security |
| 1st Author's Name | Masahiro Matsui |
| 1st Author's Affiliation | Nippon Telegraph Telephone Corporation(NTT) |
| 2nd Author's Name | Yuki Okano |
| 2nd Author's Affiliation | Nippon Telegraph Telephone Corporation(NTT) |
| 3rd Author's Name | Reo Yoshida |
| 3rd Author's Affiliation | Nippon Telegraph Telephone Corporation(NTT) |
| 4th Author's Name | Tetsutaro Kobayashi |
| 4th Author's Affiliation | Nippon Telegraph Telephone Corporation(NTT) |
| Date | 2017-11-21 |
| Paper # | ICSS2017-43 |
| Volume (vol) | vol.117 |
| Number (no) | ICSS-316 |
| Page | pp.pp.29-34(ICSS), |
| #Pages | 6 |
| Date of Issue | 2017-11-13 (ICSS) |