| Presentation | 2022-05-18 [Invited Talk] Forward Secure Message Franking (from ICISC 2021) Hiroki Yamamuro, Keisuke Hara, Masayuki Tezuka, Yusuke Yoshida, Keisuke Tanaka, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Message franking is introduced by Facebook in end-to-end encrypted messaging services. It allows to produce verifiable reports of malicious messages by including cryptographic proofs generated by Facebook. Recently, Grubbs et al. (CRYPTO'17) proceeded with the formal study of message franking and introduced committing authenticated encryption with associated data (CAEAD) as a core primitive for obtaining message franking. In this work, we aim to enhance the security of message franking and propose forward security for message franking. It guarantees the security associated with the past keys even if the current keys are exposed. Firstly, we propose the notion of key-evolving message franking including additional key update algorithms. Then, we formalize forward security for five security requirements: confidentiality, ciphertext integrity, unforgeability, receiver binding, and sender binding. Finally, we show a construction of forward secure message franking based on CAEAD, forward secure pseudorandom generator, and forward secure message authentication code. This paper was presented at ICISC 2021. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | message franking / forward security / abusive verifiable reports |
| Paper # | ISEC2022-5 |
| Date of Issue | 2022-05-11 (ISEC) |
| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2022/5/18(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Tetsuya Izu(Fujitsu Labs.) |
| Vice Chair | Noboru Kunihiro(Tsukuba Univ.) / Goichiro Hanaoka(AIST) |
| Secretary | Noboru Kunihiro(Fujitsu Labs.) / Goichiro Hanaoka(Ibaraki Univ.) |
| Assistant | Takahiro Matsuda(AIST) |
| Paper Information | |
| Registration To | Technical Committee on Information Security |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | [Invited Talk] Forward Secure Message Franking (from ICISC 2021) |
| Sub Title (in English) | |
| Keyword(1) | message franking |
| Keyword(2) | forward security |
| Keyword(3) | abusive verifiable reports |
| 1st Author's Name | Hiroki Yamamuro |
| 1st Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| 2nd Author's Name | Keisuke Hara |
| 2nd Author's Affiliation | National Institute of Advanced Industrial Science and Technology/Yokohama National University(AIST/YNU) |
| 3rd Author's Name | Masayuki Tezuka |
| 3rd Author's Affiliation | National Institute of Technology, Tsuruoka College(NIT, Tsuruoka College) |
| 4th Author's Name | Yusuke Yoshida |
| 4th Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| 5th Author's Name | Keisuke Tanaka |
| 5th Author's Affiliation | Tokyo Institute of Technology(Tokyo Tech) |
| Date | 2022-05-18 |
| Paper # | ISEC2022-5 |
| Volume (vol) | vol.122 |
| Number (no) | ISEC-27 |
| Page | pp.pp.20-20(ISEC), |
| #Pages | 1 |
| Date of Issue | 2022-05-11 (ISEC) |