Hello Allen,
You cannot find it because there is no added security feature on the HC912B32.
If you need this feature you can look at the 16-bit MCUs:
S12 MagniV:
S12 MagniV® Mixed-Signal MCUs for Automotive and Industrial | NXP
S12 (X):
16-bit S12 and S12X MCUs | NXP
I hope it helps.
Best Regards,
Diana