నైరూప్య

Low Cost (PUF) Physical Unclonable Function Using Secured Clock Network

Muthumeenakshi.N, Rajaprabha.R

With that ever increasing growth in microelectronic devices and applications, there is an equally pressing andmore demand for ensuring product authenticity, security and reliability of the electronic system. The security requirements for most of the applications are crucial and evolving. In addition more sophisticated attacks are being developed every day. These attacks often have much higher impact and essentially no way to compensate for them with additional software counter measure. Hence we introduce PUF (Physical Unclonable Function) system based on clock networks for security purpose. On chip Physical Unclonable Functions (PUFs) are emerging as a powerful security primitive that can potentially solve several security problems. In this paper we proposed a PUF system based on clock network for resolving security issues in the circuits. The main aim is to create an unclonable circuit with the help of clock network, return path and multiplexer (Mux) block. The clock network has number of sink to split the input data. Return path used to pass the signal from clock network to mux network. Mux network has multiplexer, delay buffer and SR latch. The response of the PUF circuit is unclonable bit. PUF is an external device which can be placed in a circuit to avoid cloning of the circuit. A PUF needs to be robust against reversible as well as irreversible temporal changes in circuits. PUF functions promise cheap, efficient and secure identification and authentication of devices. It is impossible to copy the protected circuit by others in an exact manner and cannot get the same functionality of the device. Thus we can protect the device from cloning.