Random intrinsic or runtime noise

Weak PUF is ideal for detecting counterfeit ICs via CRP-based authentication schemes.

1. Error Correction Code (ECC) schemes can be used to improve the robustness for both PUF responses and TRNG outputs.
2. A ring oscillator (RO)-PUF is basically a delay-based PUF.
3. A TRNG must rely on random intrinsic or runtime noise.