Method and secure boot control circuit for controlling secure boot of electronic device and method for controlling enrollment of electronic device

A method for controlling enrollment of an electronic device, comprising:

• utilizing a signing device to send a nonce to a secure boot control circuit of the electronic device;
• utilizing the secure boot control circuit to generate a response based on a first shared key of the electronic device and the nonce;
• utilizing the signing device to generate an encoding result based on a first shared key of the signing device and the nonce;
• and
• utilizing the signing device to determine whether to write an activation code into the electronic device, wherein the activation code is generated according to the first shared key and a bit sequence.

A secure boot control circuit for controlling a secure boot of an electronic device, the electronic device comprising the secure boot control circuit, the secure boot control circuit comprising:

• an anti-tampering circuit, comprising:
• an entropy source, configured to provide a random number sequence;
• a first digital circuit, coupled to the anti-tampering circuit, configured to control readout of the random number sequence;
• and
• a second digital circuit, coupled to the first digital circuit, configured to control operations of the secure boot of the electronic device, wherein:
• the second digital circuit checks randomness of an output of the entropy source to generate a check result;
• the second digital circuit generates a reference code according to the random number sequence;
• the second digital circuit compares the reference code with an activation code stored in the secure boot control circuit to generate a comparison result;
• and
• the second digital circuit determines whether to enable at least one function of the electronic device according to at least one of the check result and the comparison result.