Inner product encryption from ring learning with errors

• 作者: Shisen Fang Shaojun Yang Yuexin Zhang
• 来源期刊: 网络空间安全科学与技术（英文版）
• 年，卷（期）: 2020,（4）
• 页码范围: 45-55
• 页数: 11页
• 语种: 英文

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.