Practical Attribute Based Inner Product Functional Encryption from Simple Assumptions

Yuechen Chen; Linru Zhang; Siu-Ming Yiu

Paper 2019/846

Practical Attribute Based Inner Product Functional Encryption from Simple Assumptions

Yuechen Chen, 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.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Preprint. MINOR revision.
Keywords: Functional Encryption Attribute Based Encryption Inner Product Duel System Encryption
Contact author(s): smyiu @ cs hku hk
History: 2019-07-22: received
Short URL: https://ia.cr/2019/846
License: CC BY

BibTeX

@misc{cryptoeprint:2019/846,
      author = {Yuechen Chen and Linru Zhang and Siu-Ming Yiu},
      title = {Practical Attribute Based Inner Product Functional Encryption from Simple Assumptions},
      howpublished = {Cryptology ePrint Archive, Paper 2019/846},
      year = {2019},
      note = {\url{https://eprint.iacr.org/2019/846}},
      url = {https://eprint.iacr.org/2019/846}
}