中文摘要：

物理不可克隆函数（PhysicalUnclonableFunctions，PUF）是一种用于保护集成电路芯片安全的新方法。传统的基于振荡器的PUF在产生响应过程中振荡器的振荡频率固定不变，因此存在着被攻击的隐患。该文提出一种新的利用多频率段的PUF（MultipleFrequencySlotsbasedPUF，MFS—PUF）来解决这个问题，通过可配置的振荡器，每产生一位响应，振荡器的振荡频率便发生转移。在每一种振荡频率下，由于不可避免地制造差异，振荡器之间的频率会有微小差别，这些略有差异的频率组成了一个频率段（frequencyslot），整个系统中则存在着多个频率段。各个频率段之间随机转变，相比于传统的基于振荡器的PUF，系统输入输出响应对（Challenge—ResponsePairs，CRPs）的值更大，也更加不可预测，这使得攻击者使用建模攻击的复杂度大大增加，在保证了自身性能的同时增强了本身的安全性。

英文摘要：

Physical Unclonable Functions （PUF） is a new method for the safety of Integrated Circuit （IC） products. Nowadays, the Ring Oscillator （RO） based puf is under the shadow of being attacked because of RO＇s constant frequency. A new construct（Multiple Frequency Slots based PUF,MFS-PUF） is proposed to solve this problem. All the ROs are configurable, each RO＇s frequency changes from one to another after generating one response bit. In each frequency, ROs differ from each other because of the uncontrollable difference in manufacture and there exists a frequency slot. In the whole system, many frequency slots exist and the transfer between them are unpredictable, this makes us get more Challenge-Response Pairs （CRPs for short）, what＇s more, the system is more unpredictable. Compared with the traditional RO based PUF, it is more difficult for the attacker to model this system. This architecture not only ensures the uniqueness, but also increases the safety of itself.