Hello @KimStanley
For Signature Verification, which needs the following inputs:
1) Public Key, that is saved in the dedicated file. As long as you sign an NDA with NXP, you can get it.
2) Signature and UID, two are unique to NXP products. They are stored in a hidden area of the chip and can only be read through dedicated commands.
3) Algorithm, ICODE used is ECDSA, which is an open-source algorithm. The source code can be downloaded on GitHub.
Hope them helps.
BR
kelly