Efficient functional encryption for inner product with simulation-based security

Cybersecurity

article

Liu, Wenbo¹  Huang, Qiong¹  Chen, Xinjian¹  Li, Hongbo¹ 

[1] College of Mathematics and Informatics, South China Agricultural University;Guangzhou Key Laboratory of Intelligent Agriculture

关键词: Functional encryption;    Inner product;    Simulation-based security;   

DOI  :  10.1186/s42400-020-00067-1

学科分类：社会科学、人文和艺术（综合）

来源: Springer

【 摘 要 】

Functional encryption (FE) is a novel paradigm for encryption scheme which allows tremendous flexibility in accessing encrypted information. In FE, a user can learn specific function of encrypted messages by restricted functional key and reveal nothing else about the messages. Inner product encryption (IPE) is a special type of functional encryption where the decryption algorithm, given a ciphertext related to a vector x and a secret key related to a vector y, computes the inner product x·y. In this paper, we construct an efficient private-key functional encryption (FE) for inner product with simulation-based security, which is much stronger than indistinguishability-based security, under the External Decisional Linear assumption in the standard model. Compared with the existing schemes, our construction is faster in encryption and decryption, and the master secret key, secret keys and ciphertexts are shorter.

【 授权许可】

CC BY