Efficient design of Oscillator based Physical Unclonable Functions on Flash FPGAs

Abstract

International audience—With the scaling down of electronic devices and the boom of wireless communications, more and more smart devices are interconnected in what we call the Internet of Things. Connecting devices of everyday use can greatly improve our comfort, but it can also introduce unprecedented security problems. With billions of devices connected there is a huge risk of unauthorized use. In this context, Physical Unclonable Functions (PUFs) are a promising solution since they extract device intrinsic fingerprint that can be used for hardware identification and authentication. Here we present the first fully functional implementation of Oscillator based PUFs on Flash based FPGA. The implementation is presented for the Ring Oscillator based PUF and the Transient Effect Ring Oscillatory based PUF. After explaining those two PUF principles, we give all the necessary design practices to follow to obtain an efficient PUF implementation on Flash FPGA. Finally, we present the characterization of the PUFs and compare it to previous work. To the best of our knowledge, it is the first work which deals with the implementation of Oscillator based PUF on Flash FPGAs. Moreover, all design files are available online to ensure repeatability

Physical unclonable function: architectures, applications and challenges for dependable security

“…Sahoo , et al in [40] proposed a novel design based on MC‐PUF, where randomness is achieved by using interconnect delays in the data path of hardware multiplier. Implementation of oscillator‐based PUFs on flash‐based FPGA is proposed by Mureddu , et al in [41] with a new design of RO‐PUF and transient effect RO‐PUF (TERO‐PUF) [42]. Ngo , et al proposed TERO‐PUF to overcome sensitivity to locking phenomenon by using ring oscillators in both PUF and true random number generator.…”