Cryptology ePrint Archive: Report 2021/680

Efficient Attribute Based Encryption for Boolean Circuits

Alexandru Ionita

Abstract: We provide a new technique for secret sharing and reconstruction for Boolean circuits, applicable in ABE systems.

We show that our construction holds for Key-policy ABE and can be adapted also to Ciphertext-policy ABE. This is the most efficient solution for Attribute Based Encryption for circuits access structures using bilinear maps. Our KP-ABE system has decryption key of linear size in the number of attributes, and public parameters linear in the circuit size (Two public values for each FO-gate). We prove that our scheme is secure under the decisional bilinear Diffie-Hellman Assumption in the Selective Set Model.

Category / Keywords: public-key cryptography / attribute-based encryption, public-key cryptography, secret sharing, bilinear maps, access control,

Date: received 24 May 2021

Contact author: alexandru p ionita at gmail com

Available format(s): PDF | BibTeX Citation

Version: 20210525:071239 (All versions of this report)

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