Efficient functional encryption for inner product with simulation-based security

被引:6
作者
Liu, Wenbo [1 ]
Huang, Qiong [1 ,2 ]
Chen, Xinjian [1 ]
Li, Hongbo [1 ]
机构
[1] South China Agr Univ, Coll Math & Informat, 483 Wushan Rd, Guangzhou 510642, Peoples R China
[2] Guangzhou Key Lab Intelligent Agr, 483 Wushan Rd, Guangzhou 510642, Peoples R China
基金
中国国家自然科学基金;
关键词
Functional encryption; Inner product; Simulation-based security;
D O I
10.1186/s42400-020-00067-1
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
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.
引用
收藏
页数:13
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