SAMD21 Arduino Zero - how to activate the protection bit?

Question

Arduino

There is a Chinese clone of Arduino Zero /

You need to protect it from copying. The documentation shows the presence of "Set Security Bit (SSB)".
Using Microchip Studio 7 and the "J-link" programmer, I open the corresponding section:

I press the button and receive confirmation.
I turn off the power of the controller and after turning it on I try to copy the memory.
And everything is perfectly copied. No security features appear.
Against the backdrop of a convenient and simple copy protection mechanism available in the AVR family of controllers, this situation is somewhat discouraging.

Question:
How does protection work for the ATSAMD21G18A controller and what is needed to activate it?

Answer 1

The solution (itself) was found, maybe someone will need it.
https://forum.arduino.cc/t/code-protection-for-sam...
The principle is this:
Apparently ... Arduino bootloader for some reason to edit Fuse at the time of startup. There are C commands with which we can also return everything as it should.
The method is simple. We always force the security bit to be set at startup.