With the development of the Internet of Things (IoT), the application of micro-computing strips, such as RFID chips and wireless sensor networks, has become more and more widespread, bringing great convenience to people's lives. At the same time, how to ensure the security of information has attracted more and more attention. Because of the limited resources of micro-computing devices, lightweight block cipher algorithms that pursue efficiency and ensure security have emerged. The paper proposes to modify the lightweight PUFFIN algorithm in the forwarding engine switch to solve the problem of information security in the switch. The hardware circuit design of the algorithm is optimized, and each module is compiled and implemented. The serial and parallel combination is adopted in the overall implementation of the algorithm, and the simulation is successfully implemented by ModelSim software. The pipeline delay of the de-synchronization plus descrambling module is 8 TCLKs, and the data throughput rate is 100Gbps when entering the pipeline input.
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