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Paper 2021/003

Ciphertext Policy Attribute Based Encryption for Arithmetic circuits

Mahdi Mahdavi Oliaee and Zahra Ahmadian

Abstract

We present the first Ciphertext Policy Attribute Based Encryption (CP-ABE) scheme where access policies are expressed as arithmetic circuits. The idea is first introduced as a basic design based on the multilinear map. Then, two improved versions of that, with or without the property of hidden attributes, are introduced. We also define the concept of Hidden Result Attribute Based Encryption (HR-ABE) which means that the result of the arithmetic function is hidden from the users. We prove that the proposed schemes have adaptive security, under the assumption of the hardness of the (k-1)-Distance Decisional Diffie- Hellman problem.

Metadata
Available format(s)
PDF
Category
Public-key cryptography
Publication info
Preprint. MINOR revision.
Keywords
Arithmetic circuitMultilinear mapAdaptive securityHidden attributesHidden Result
Contact author(s)
zahraahmadian @ yahoo com
History
2022-03-02: last of 7 revisions
2021-01-02: received
See all versions
Short URL
https://ia.cr/2021/003
License
Creative Commons Attribution
CC BY
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