| Presentation | 2013-07-19 Cryptosystems for Social Organizations Managed by Receiving Administrator : TSK-MPKC for Hierarchical Organizations and ECC for Flat type Organizations Shigeo TSUJII, Hiroshi YAMAGUCHI, Kohtaro TADAKI, Masahito GOTAISHI, Ryo FUJITA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | As to the application of public key cryptosystem to social organizations, Attribute Based Encryption and Functional Encryption are extensively being developed. In such encryption systems, a sending organization has to identify or decide the qualified receiver in the receiving organization by embedding the capacity of decryption of sending information in the encrypted data or the encryption key. As an example, it is easy for broadcast companies to embed the capacity of viewing of charged television. However, it is often difficult for sending organization to decide the qualified receiver. In such cases, secret communication systems proposed in this presentation seems to be crucial. Although there are various types of social organizations, typically they are divided types; one has hierarchi-cal structure and the other has flat structure. In this paper we propose the Multivariate Public Key Cryptosystem (MPKC) for organizations with hierarchical structure and the elliptic curve cryptosystem for organizations with flat structure. As to MPKC, the structure with Perturbed TSK-MPKC and PQ type TSK-MPKC proposed in Third international conference on Symbolic Computation and Cryptography (SCC 2012, in Castro Urdiales, Spain) can be used. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Encryption for Social Organizations / TSK-MPKC (Tsujii-Shamir-Kasahara) Type MPKC / PQ-MPKC / Elliptic Curve Cryptosystem |
| Paper # | ISEC2013-40,SITE2013-35,ICSS2013-45,EMM2013-42 |
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| Conference Information | |
| Committee | SITE |
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| Conference Date | 2013/7/11(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Social Implications of Technology and Information Ethics (SITE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Cryptosystems for Social Organizations Managed by Receiving Administrator : TSK-MPKC for Hierarchical Organizations and ECC for Flat type Organizations |
| Sub Title (in English) | |
| Keyword(1) | Encryption for Social Organizations |
| Keyword(2) | TSK-MPKC (Tsujii-Shamir-Kasahara) Type MPKC |
| Keyword(3) | PQ-MPKC |
| Keyword(4) | Elliptic Curve Cryptosystem |
| 1st Author's Name | Shigeo TSUJII |
| 1st Author's Affiliation | Research and Development Initiative, Chuo University() |
| 2nd Author's Name | Hiroshi YAMAGUCHI |
| 2nd Author's Affiliation | Research and Development Initiative, Chuo University |
| 3rd Author's Name | Kohtaro TADAKI |
| 3rd Author's Affiliation | Research and Development Initiative, Chuo University |
| 4th Author's Name | Masahito GOTAISHI |
| 4th Author's Affiliation | Research and Development Initiative, Chuo University |
| 5th Author's Name | Ryo FUJITA |
| 5th Author's Affiliation | Research and Development Initiative, Chuo University |
| Date | 2013-07-19 |
| Paper # | ISEC2013-40,SITE2013-35,ICSS2013-45,EMM2013-42 |
| Volume (vol) | vol.113 |
| Number (no) | 136 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |