ID 原文 译文
46996 分析以往格上基于身份的全同态加密方案， The previous identity-based homomorphic encryption schemes from lattice was analyzed.
46997 指出方案效率低的根本原因在于陷门生成和原像采样过程的复杂度过高， That the high com-plexity in previous schemes was mainly caused by trapdoor generation and preimage sampling was pointed out.
46998 为此提出一种新的解决方案。 A newsolution was proposed.
46999 先将新型陷门函数与对偶容错学习（LWE，learning with errors）算法有机结合，构造一种新的格上基于身份的加密方案；再利用特征向量方法转化为格上基于身份的全同态加密方案。 A novel identity-based encryption scheme from lattice by combining new trapdoor function anddual-LWE algorithm organically was constructed, and it was transformed to an identity-based fully homomorphic encryp-tion scheme from lattice by employing the idea of eigenvector.
47000 对比分析表明，所提方案的陷门生成复杂度显著降低，原像采样复杂度约降低为以往方案的13，SIVP 近似因子缩小为以往方案的1m。 Comparative analysis shows that the scheme’s complexityof trapdoor generation has a significant reduction, the complexity of preimage sampling has a nearly three-fold reduction,and the SIVP approximation factor has a m times reduction.
47001 在标准模型下，方案安全性归约至判定性 LWE 的难解性，并包含严格的安全性证明。 The security of the proposed scheme strictly reduces to thehardness of decisional learning with errors problem in the standard model.
47002 为了研究雷暴云对星地量子链路信道的影响，根据雷暴云中大气带电粒子的消光截面与数目浓度分布函数，得到了粒子浓度、电荷密度与链路衰减系数的关系。 In order to investigate the effect of thunderstorm cloud on the performance of satellite-to-ground quantum link,according to the extinction cross section and the number concentration distribution function of the charged particle in thethunderstorm cloud, the relationships among the particle concentration, charge density and link attenuation of chargedparticles in atmosphere were established.
47003 建立了粒子浓度、电荷密度与信道容量、信道平均保真度、信道生存函数和量子密钥分发系统误码率之间的关系。 The relationship between the atmospheric concentration of charged particles,the charge density on the average channel capacity, channel fidelity, channel survival function and bit error rate of quan-tum key distribution system were put out.
47004 仿真结果表明，雷暴云对星地量子链路性能有显著的影响。 The simulation results show that the thunderstorm cloud has a significant effecton the performance of the satellite-to-ground quantum link.
47005 所以，应根据雷暴云的预报情况，自适应调整量子卫星通信系统的各项参数，以提高星地链路的可靠性。 So in order to improve the reliability of satellite-groundquantum communication, the system parameters should be adjusted according to the forecast of the thunderstorm cloud.