| Presentation | 2007-12-19 Attribute-Based Encryption with Partially Hidden Ciphertext Policies Takashi NISHIDE, Kazuki YONEYAMA, Kazuo OHTA, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We propose an attribute-based encryption scheme where encryptor-specified policies are hidden. By using our scheme, an encryptor can encrypt data with a hidden access control policy. A decryptor obtains her secret key associated with her attributes from a trusted authority and if the attributes associated with the decryptor's secret key do not satisfy the access control policy associated with the encrypted data, the decryptor cannot decrypt the data nor know what access control policy was specified by the encryptor. We prove security of our construction based on the Decisional Blinear Diffie-Hellman assumption and the Decision Linear assumption. In our security notion, even the legitimate decryptor cannot obtain the information about the access control policy associated with the encrypted data more than the fact that she can decrypt the data. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Attribute-Based Encryption / Recipient Anonymity / Access Control on Encrypted Data |
| Paper # | ISEC2007-125 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2007/12/12(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| 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) | Attribute-Based Encryption with Partially Hidden Ciphertext Policies |
| Sub Title (in English) | |
| Keyword(1) | Attribute-Based Encryption |
| Keyword(2) | Recipient Anonymity |
| Keyword(3) | Access Control on Encrypted Data |
| 1st Author's Name | Takashi NISHIDE |
| 1st Author's Affiliation | Department of Information and Communication Engineering, The University of Electro-Communications:Hitachi Software Engineering Co., Ltd.() |
| 2nd Author's Name | Kazuki YONEYAMA |
| 2nd Author's Affiliation | Department of Information and Communication Engineering, The University of Electro-Communications |
| 3rd Author's Name | Kazuo OHTA |
| 3rd Author's Affiliation | Department of Information and Communication Engineering, The University of Electro-Communications |
| Date | 2007-12-19 |
| Paper # | ISEC2007-125 |
| Volume (vol) | vol.107 |
| Number (no) | 397 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |