In this paper, based on provable security theory, a provable security cipher DFC is improved on speed without lost of security by means of fast implementation of square hash function.

介绍基于对称密码系统的可证明安全理论，利用平方哈希函数实现技术，对一种可证明安全算法DFC实施改进后，安全性没有损失，但是速度得到了提高。

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Based on the implementation of digital control of each DFC mode with microprocessor, this paper presents a scheme for multimode synthesis and conversion between each other.

本文在微处理机单独实现各模态控制功能基础上，对各模态功能进行综合，指出模态转换的实现技术。

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Using the automated mercury vapor analyzer and dynamic flux chamber(DFC) method, the pathways of mercury emissions to atmosphere were measured at a closed landfill in Wuhan, China.

利用自动测汞仪和动力学通量箱技术，对武汉市某生活垃圾填埋场封闭的扩建部分向大气释放汞的途径进行了研究。

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Nonetheless, McGovern, the peace candidate, arguably had the strongest combat veteran credentials to date, perhaps overall, with 35 combat missions in a B-24 and a DFC.

FORBES: George McGovern Passes On - Where Were You In 1972 ?

He received a second DFC in September 1944 where he participated in an operation which resulted in the destruction of a German Convoy and, despite sustaining serious damage to his aircraft, flew safely back to base.

BBC: Daring World War II pilot Ken Gatward's medals auctioned

The report comes from DFC Intelligence, who claims a recent surge in popularity has propelled Dota 2 to leapfrog its longtime competition.

FORBES: No, Dota 2 Has Not Unseated League of Legends