whycard ISO 14443 type B the PUPI (Pseudo Unique PICC Identifier) the value always be changes ?

[BANGYUD]

Anyone knows me, why tagISO 14443 the PUPI value always changes?

@fangfang and team please help ,, thanks

[BANGYUD]

nice thanks for the answering

[Fabian_R]

Hello BANGYUD, thank you for writing us, according to the ISO specification this value isn´t static. Is a 4-byte that can be dynamically generated or being a fixed number.

The full explanation regarding this feature is in the ISO 14443 specification.