Implementation of PUF based on RO circuit

The modern cryptographic protocol specifies that only authorized participants can gain access to the key and obtain information. However, the way to leak passwords through intrusion into the system is endless, causing serious problems for modern information security. On this issue, the advantages of PUF for information security to provide further protection. For example:Arbiter PUF，RO PUF,SRAM PUF. This project is designed to integrate the physical information into the circuit design to achieve the design of the PUF. Comparing to existing RO-PUF, PISO shift register reduce the hardware. A 4-bit challenge can produce 16-bit random response, which greatly increases the number of challenge response pair, and the internal Hamming distance is measured by the FPGA.