Cryptology ePrint Archive: Report 2019/846

Practical Attribute Based Inner Product Functional Encryption from Simple Assumptions

Yuechen Chen and Linru Zhang and Siu-Ming Yiu

Abstract: Functional encryption (FE) that bases on user attributes has many useful practical applications. For example, a company may only authorize department heads of other sections to query the average sale figures of the sales department from the encrypted sales amounts of all sales. However, FE schemes that can solve this problem are based on new, but not well-studied assumptions (such as indistinguishable obfuscation or multilinear maps). It is not clear if these FE schemes are secure. In this paper, we develop the first functional encryption scheme (ABFE) from simple and well-studied assumptions that can authorize a user base on the user's attributes to obtain a functional value of the encrypted data.

Category / Keywords: public-key cryptography / Functional Encryption, Attribute Based Encryption, Inner Product, Duel System Encryption

Date: received 19 Jul 2019

Contact author: smyiu at cs hku hk

Available format(s): PDF | BibTeX Citation

Version: 20190722:072239 (All versions of this report)

Short URL: ia.cr/2019/846