Inner product encryption from ring learning with errors

Cybersecurity

Yuexin Zhang¹  Shaojun Yang¹  Shisen Fang¹ 

[1] The Fujian Provincial Key Laboratory of Network Security and Cryptology, College of Mathematics and Informatics, Fujian Normal University, 350108, Fuzhou, PR, China;

关键词: Functional encryption;    Inner product encryption;    Lattices;    Ring learning with errors;   

DOI  :  10.1186/s42400-020-00062-6

来源: Springer

【 摘 要 】

The functional encryption scheme designed using the lattice can realize fine-grained encryption and it can resist quantum attacks. Unfortunately, the sizes of the keys and ciphertexts in cryptographic applications based on learning with errors are large, which makes the algorithm inefficient. Therefore, we construct a functional encryption for inner product predicates scheme by improving the learning with errors scheme of Agrawal et al. [Asiacrypt 2011], and its security relies on the difficulty assumption of ring learning with errors. Our construction can reduce the sizes of the keys and ciphertexts compared with the learning with errors scheme.

【 授权许可】

CC BY