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b10-1. 雑誌掲載論文 >
このアイテムの引用には次の識別子を使用してください:
http://hdl.handle.net/10119/4372
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| タイトル: | Ancestor Excludable Hierarchical ID-based Encryption and Its Application to Broadcast Encryption |
| 著者: | Miyaji, Atsuko |
| 発行日: | 2007-09 |
| 出版者: | 情報処理学会 |
| 誌名: | 情報処理学会論文誌 |
| 巻: | 48 |
| 号: | 9 |
| 開始ページ: | 2999 |
| 終了ページ: | 3013 |
| 抄録: | An ID-based encryption (IBE) is a public key cryptosystem, in which a user's public key is given as a user ID. In IBE, only a single center generates all user secret keys, which may give the center a load of burdensome work. A hierarchical ID-based encryption (HIBE) is a kind of IBE and overcomes the problem by delegating a user secret key generation to a lower-level center, in which centers form a hierarchical structure. However, all ancestor nodes in HIBE act as centers. That is, any ancestor as well as the root can generate a secret key for any descendant node and, thus, a cipher text to a node can be decrypted by any ancestor node even if the ancestor does not have the same secret key as that of a target node. In this paper, we propose the concept of ancestor-excludable HIBE, in which ancestors with a level less than the designated one can be excluded from a set of privileged ancestors with a right to decrypt a cipher text to a target node. We also give the functional definition together with the security definition. This notion is denoted by AE-HIBE simply. We present the concrete example of AE-HIBE, which can work with constant-size ciphertext and decryption time, independent of the hierarchy level. We prove that our AE-HIBE is selective-ID-CPA secure in the standard model, which can be converted to be selective-ID-CCA secure by applying a general conversion method. Furthermore, AE-HIBE can be naturally applied to the broadcast encryption to realize the efficient public-key version with the user-key size of O(log^2 N) and the transmission rate of O(γ) for N users and γ revoked users. The user-key size is the smallest at the transmission rate of O(γ), up to the present. |
| Rights: | 社団法人 情報処理学会, Atsuko Miyaji, 情報処理学会論文誌, 48(9), 2007, 2999-3013. ここに掲載した著作物の利用に関する注意: 本著作物の著作権は（社）情報処理学会に帰属します。本著作物は著作権者である情報処理学会の許可のもとに掲載するものです。ご利用に当たっては「著作権法」ならびに「情報処理学会倫理綱領」に従うことをお願いいたします。 Notice for the use of this material: The copyright of this material is retained by the Information Processing Society of Japan (IPSJ). This material is published on this web site with the agreement of the author (s) and the IPSJ. Please be complied with Copyright Law of Japan and the Code of Ethics of the IPSJ if any users wish to reproduce, make derivative work, distribute or make available to the public any part or whole thereof. All Rights Reserved, Copyright (C) Information Processing Society of Japan. |
| URI: | http://hdl.handle.net/10119/4372 |
| 資料タイプ: | author |
| 出現コレクション: | b10-1. 雑誌掲載論文 (Journal Articles)
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このアイテムのファイル:
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