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政大機構典藏 > 資訊學院 > 資訊科學系 > 期刊論文 > Item 140.119/131408

Please use this identifier to cite or link to this item: https://nccur.lib.nccu.edu.tw/handle/140.119/131408

Title:	Provably Secure Ciphertext-Policy Attribute-Based Encryption from Identity-Based Encryption
Authors:	曾一凡 Tseng, Yi-Fan Fan, Chun-I Lin, Chih-Wen
Contributors:	資科系
Keywords:	Attribute-Based Encryption;Identity-Based Encryption;Constant-Size Ciphertexts/Keys;Hidden Access Policies
Date:	2019-03
Issue Date:	2020-09-02 09:14:59 (UTC+8)
Abstract:	Ciphertext-policy attribute-based encryption (CP-ABE) is an access control mechanism where a data provider encrypts a secret message and then sends the ciphertext to the receivers according to the access policy which she/he decides. If the attributes of the receivers match the access policy, then they can decrypt the ciphertext. This paper shows a relation between CP-ABE and identity-based encryption (IBE), and presents a bi-directional conversion between an access structure and identities. By the proposed conversion, the CP-ABE scheme constructed from an IBE scheme will inherit the features, such as constant-size ciphertexts and anonymity, from the IBE scheme, and vice versa. It turns out that the proposed conversion also gives the first CP-ABE achieving access structures with wildcard and constant-size ciphertexts/private keys. Finally, we prove the CCA security for confidentiality and anonymity.
Relation:	Journal of Universal Computer Science, Vol.25, No.3, pp.182-202
Data Type:	article
Appears in Collections:	[資訊科學系] 期刊論文

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