NDLI: Multi-authority ciphertext-policy attribute-based encryption with accountability

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Multi-authority ciphertext-policy attribute-based encryption with accountability

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Multi-authority ciphertext-policy attribute-based encryption with accountability

Content Provider	ACM Digital Library
Author	Li, Jin Huang, Qiong Chen, Xiaofeng Xie, Dongqing Chow, Sherman S. M. Wong, Duncan S.
Abstract	Attribute-based encryption (ABE) is a promising tool for implementing fine-grained cryptographic access control. Very recently, motivated by reducing the trust assumption on the authority, and enhancing the privacy of users, a multiple-authority key-policy ABE system, together with a semi-generic anonymous key-issuing protocol, have been proposed by Chase and Chow in CCS 2009. Since ABE allows encryption for multiple users with attributes satisfying the same policy, it may not be always possible to associate a decryption key to a particular individual. A misbehaving user could abuse the anonymity by leaking the key to someone else, without worrying of being traced. In this paper, we propose a multi-authority ciphertext-policy (AND gates with wildcard) ABE scheme with accountability, which allows tracing the identity of a misbehaving user who leaked the decryption key to others, and thus reduces the trust assumptions not only on the authorities but also the users. The tracing process is efficient and its computational overhead is only proportional to the length of the identity.
Starting Page	386
Ending Page	390
Page Count	5
File Format	PDF
ISBN	9781450305648
DOI	10.1145/1966913.1966964
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2011-03-22
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Access control Multi-authority Accountability Anonymity Attribute-based encryption Ciphertext-policy Policy-privacy
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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