Electronic system capable of self-certification

An electronic system comprising:

• a first circuit comprising:
• a first activation unit configured to receive a first challenge string, generate a first response string using an encryption block according to the first challenge string and a first key, and output the first response string;
• and
• a first functional unit configured to perform a first designated function after a first activation operation passes certification;
• and
• a second circuit comprising:
• a second activation unit configured to send the first challenge string to the first circuit during the first activation operation, and determine whether the first activation operation passes certification or not according to the first challenge string, the first response string and the first key;
• and
• a second functional unit configured to perform a second designated function when the first activation operation is determined to have passed the certification, and not perform the second designated function when the first activation operation is determined to have failed the certification;
• wherein before the first function unit performs the first designated function and the second function unit performs the second designated function, perform the first activation operation using the first activation unit and determine whether the first activation operation passes certification or not using the second activation unit;
• and
• wherein the first functional unit performs read/write operations while the second functional unit performs logic operations required by the electronic system and the electronic system is a system-on-chip.