Functional Encryption for Inner Product with Full Function Privacy

被引：72

作者：

Datta, Pratish ^{[1
]}

Dutta, Ratna ^{[1
]}

Mukhopadhyay, Sourav ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Math, Kharagpur 721302, W Bengal, India

来源：

PUBLIC-KEY CRYPTOGRAPHY - PKC 2016, PT I | 2016年 / 9614卷

关键词：

Functional encryption; Inner product; Function privacy; Asymmetric bilinear group;

D O I：

10.1007/978-3-662-49384-7_7

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) supports constrained decryption keys that allow decrypters to learn specific functions of encrypted messages. In numerous practical applications of FE, confidentiality must be assured not only for the encrypted data but also for the functions for which functional keys are provided. This paper presents a non-generic simple private key FE scheme for the inner product functionality, also known as inner product encryption (IPE). In contrast to the existing similar schemes, our construction achieves the strongest indistinguishability-based notion of function privacy in the private key setting without employing any computationally expensive cryptographic tool or nonstandard complexity assumption. Our construction is built in the asymmetric bilinear pairing group setting of prime order. The security of our scheme is based on the well-studied Symmetric External Diffie-Hellman (SXDH) assumption.

引用

页码：164 / 195

页数：32

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