Thanks. Could you ask them why they used TOGGLE_RATE 0.2? For SHA-256 TOGGLE_RATE should be 50%, this is pretty much a design goal for any one-way hash function.

Edit: Bonus question: Ask them how they calibrate/characterize the temperature sensors. IIRC your temperature sensors are intentionally low-resolution: something like 10C,20C,30C,... What is the achieved accuracy of step-crossing temperature for your existing chips that were already manufactured?