| Presentation | 1996/5/20 How to Protect Data and Delegated Keys in Digital Distribution Masahiro MAMBO, Yoshinori YAMANE, Kouichi SAKURAI, Eiji OKAMOTO, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A cryptography is quite effective for protecting digital information from unauthorized access. But if a receiver of information is determined after the encryption of the information, e.g. a posted encrypted news is withdrawn by an arbitrary user in open networks, there should be a method to convert the encrypted information into a form to be read only by an admissible user. Although such a transformation is done by the consecutive execution of decryption of a ciphertext and re-encryption of a recovered plaintext, an intermediary plaintext may be stolen. In this paper we propose secure digital distribution systems by which encrypted information is directly transformed into a ciphertext of an arbitrary admissible user. We show that techniques of a proxy cryptosystem and a blind decoding system are useful to establish these distribution systems. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Digital Distribution System / Proxy Cryptosystem / Blind Decoding / RSA Cryptosystem / ElGamal Cryptosystem / Secrecy |
| Paper # | ISEC96-6 |
| Date of Issue |
| Conference Information | |
| Committee | ISEC |
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| Conference Date | 1996/5/20(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Information Security (ISEC) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | How to Protect Data and Delegated Keys in Digital Distribution |
| Sub Title (in English) | |
| Keyword(1) | Digital Distribution System |
| Keyword(2) | Proxy Cryptosystem |
| Keyword(3) | Blind Decoding |
| Keyword(4) | RSA Cryptosystem |
| Keyword(5) | ElGamal Cryptosystem |
| Keyword(6) | Secrecy |
| 1st Author's Name | Masahiro MAMBO |
| 1st Author's Affiliation | School of Information Science, Japan Advanced Institute of Science and Technology() |
| 2nd Author's Name | Yoshinori YAMANE |
| 2nd Author's Affiliation | Dept. of Computer and Communication Engineering, Kyushu University |
| 3rd Author's Name | Kouichi SAKURAI |
| 3rd Author's Affiliation | Dept. of Computer and Communication Engineering, Kyushu University |
| 4th Author's Name | Eiji OKAMOTO |
| 4th Author's Affiliation | School of Information Science, Japan Advanced Institute of Science and Technology |
| Date | 1996/5/20 |
| Paper # | ISEC96-6 |
| Volume (vol) | vol.96 |
| Number (no) | 47 |
| Page | pp.pp.- |
| #Pages | 11 |
| Date of Issue | |