（C）保密增强（privacy amplification）：在保密增强阶段，Mice和Bob从一个部 分保密的比特串S产生一个高度保密的比特串K，而且使Eve对比特串K 几乎一无所知。
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The information gained by the eavesdropper through interception is a very important criterion for judging the success of the key transmission and a necessary parameter for the privacy amplification.
窃听者通过窃听所获取的信息量是决定密钥传输是否成功的重要指标，同时也是保密增强这一技术环节的必要参数。
参考来源 - 量子密钥分配方案及其信息安全性研究·2,447,543篇论文数据，部分数据来源于NoteExpress
此外还给出了保密增强能够提取出的高度保密串的长度与敌手关于部分保密串的最小熵的关系。
The relationship between the size of highly secret string distilled and the opponent's min-entropy is also illustrated.
从试验结果看，两种算法能够抵抗JPEG 压缩以及高斯噪声等信号处理的攻击，且改进后的算法水印鲁棒性及保密性得到了增强。
The experimental results show that both of them can resist signal distortions such as JPEG compression, Gauss noise, and the improved algorithm has better robustness and security.
他要求苹果员工严格执行保密，他认为这种策略增强了人们对即将发布的苹果产品的期待。
He enforced strict secrecy among Apple employees, a strategy that he believed heightened anticipation for upcoming Apple products.
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