Unique properties of every ESP32

[doglike]

Hi,

I am trying to develop a licensing concept for my ESP32 project and looking for properties of the ESP32, which are unique for every chip.
Hoping to bind one specific license key to a specific ESP32.

First one is probably the Wifi MAC adress.
Are there any more?

Thanks in advance!

[ESP_Sprite]

The base MAC address is indeed guaranteed to be unique. If you need more, you can use the efuses that are available to the users to put an unique serial, private key, or something else in the chip during production.