講演抄録/キーワード |
講演名 |
2007-12-19 16:10
Attribute-Based Encryption with Partially Hidden Ciphertext Policies ○Takashi Nishide(Univ. of Electro-Comm./Hitachi Software)・Kazuki Yoneyama・Kazuo Ohta(Univ. of Electro-Comm.) ISEC2007-125 |
抄録 |
(和) |
(まだ登録されていません) |
(英) |
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. |
キーワード |
(和) |
Attribute-Based Encryption / Recipient Anonymity / Access Control on Encrypted Data / / / / / |
(英) |
/ / / / / / / |
文献情報 |
信学技報, vol. 107, no. 397, ISEC2007-125, pp. 93-100, 2007年12月. |
資料番号 |
ISEC2007-125 |
発行日 |
2007-12-12 (ISEC) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
PDFダウンロード |
ISEC2007-125 |