| Presentation | 2023-03-02 Timeout ciphers based on ID-based cryptography Shota Oriyama, Hiroyuki Tsuji, Tomoaki Kimura, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Encryption technology has become indispensable in the information society, and although encryption technology is used for electronic files such as PDFs, these encryptions are generally based on authentication with a password. However, if electronic files can be viewed by setting a time limit, the range of application is considered to be large. While there are time-release encryption schemes that allow decryption after a specified time, as of 2022 there are no encryption schemes that allow decryption after a specified time has elapsed. In this paper, we propose a method to make various electronic resource files private after a certain time has elapsed. The proposed method is based on the ID-based encryption algorithm, which is the basis of the time-release ciphers, and proposes a time-out algorithm (hereinafter referred to as "time-out cipher"). It is confirmed that the proposed method can be decrypted before the expiration date and cannot be decrypted after the expiration date (timeout). As a result, it was confirmed that encryption and decryption of the timeout ciphers are possible or not depending on the time, and that decryption is not possible for 10 years after the expiration date, thus clarifying the effectiveness of the proposed method. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Identity-Based Encryption / Pairing / Elliptic curve cryptography |
| Paper # | SIS2022-45 |
| Date of Issue | 2023-02-23 (SIS) |
| Conference Information | |
| Committee | SIS |
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| Conference Date | 2023/3/2(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Chiba Institute of Technology |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Tomoaki Kimura(Kanagawa Inst. of Tech.) |
| Vice Chair | Naoto Sasaoka(Tottori Univ.) / Hakaru Tamukoh(Kyushu Inst. of Tech.) |
| Secretary | Naoto Sasaoka(NTT) / Hakaru Tamukoh(Kansai Univ.) |
| Assistant | Yoshiaki Makabe(Kanagawa Inst. of Tech.) / Yosuke Sugiura(Saitama Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Smart Info-Media Systems |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Timeout ciphers based on ID-based cryptography |
| Sub Title (in English) | |
| Keyword(1) | Identity-Based Encryption |
| Keyword(2) | Pairing |
| Keyword(3) | Elliptic curve cryptography |
| 1st Author's Name | Shota Oriyama |
| 1st Author's Affiliation | Kanagawa Institute of Technology(KAIT) |
| 2nd Author's Name | Hiroyuki Tsuji |
| 2nd Author's Affiliation | Kanagawa Institute of Technology(KAIT) |
| 3rd Author's Name | Tomoaki Kimura |
| 3rd Author's Affiliation | Kanagawa Institute of Technology(KAIT) |
| Date | 2023-03-02 |
| Paper # | SIS2022-45 |
| Volume (vol) | vol.122 |
| Number (no) | SIS-410 |
| Page | pp.pp.27-32(SIS), |
| #Pages | 6 |
| Date of Issue | 2023-02-23 (SIS) |