NDLI: Blind attribute-based encryption and oblivious transfer with fine-grained access control

Content Provider	Springer Nature Link
Author	Rial, Alfredo
Copyright Year	2015
Abstract	We propose two constructions of oblivious transfer with access control (OTAC), i.e., oblivious transfer schemes in which a receiver can obtain a message only if her attributes, which are certified by a credential issuer, satisfy the access control policy of that message. The receiver remains anonymous towards the sender and the receiver’s attributes are not disclosed to the sender. Our constructions are based on any ciphertext policy attribute based encryption ( $$\mathrm {CPABE}$$ ) scheme that fulfills the committing and key separation properties, which we define. We also provide a committing $$\mathrm {CPABE}$$ with key separation scheme that supports any policy described by a monotone access structure, which, in comparison to previous work, allows our OTAC construction to support efficiently a wider variety of access control policies. In our constructions, a receiver obtains from the sender a $$\mathrm {CPABE}$$ secret key for her attributes by using a blind key extraction with access control protocol. We provide a blind key extraction with access control protocol for any committing $$\mathrm {CPABE}$$ with key separation scheme. Previous work only provided ad-hoc constructions of blind key extraction protocols. Our generic protocol works in a hybrid model that employs novel ideal functionalities for oblivious transfer and for anonymous attribute authentication. We propose constructions that realize those novel ideal functionalities and analyze the overall efficiency of our OTAC constructions.
Ending Page	223
Page Count	45
Starting Page	179
File Format	PDF
ISSN	09251022
e-ISSN	15737586
Journal	Designs, Codes and Cryptography
Issue Number	2
Volume Number	81
Language	English
Publisher	Springer US
Publisher Date	2015-10-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Access control Blind key extraction Information and Communication, Circuits Data Encryption Cryptographic protocols Privacy Data Structures, Cryptology and Information Theory Data encryption Discrete Mathematics in Computer Science Attribute-based encryption Coding and Information Theory Oblivious transfer Cryptography Combinatorics
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Discrete Mathematics and Combinatorics Theoretical Computer Science Computer Science Applications

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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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