System on chip and processing device

A system on chip (SoC), wherein the SoC is integrated on a first semiconductor chip, and comprises:

• a system bus;
• a security processor system coupled to the system bus;
• at least one processor coupled to the system bus wherein the at least one processor comprises at least one central processing unit that is configured to execute general-purpose operating system software and to communicate with the security processor system through the system bus under the action of the general-purpose operating system software, wherein:
• the security processor system comprises a security processor, a first memory, multiple interfaces, and a security bus, and
• the security processor, the first memory, and the multiple interfaces are coupled to the security bus, and the security bus is coupled to the system bus, and
• security isolation exists between the security processor system and the at least one processor;
• and
• the security processor is configured to execute security operating system software and at least one security software application based on the security operating system software, wherein the at least one security software application comprises mobile payment software used to implement mobile payment;
• the first memory is configured to provide storage space used by the security processor to execute the security operating system software and the at least one security software application;
• the multiple interfaces comprise a near field communication NFC interface and a biometric recognition input interface,
• the NFC interface is configured to exchange NFC information related to the mobile payment with an NFC peer through an NFC processor;
• and
• the biometric recognition input interface is configured to receive biometric recognition data from a biometric recognition sensor, wherein the biometric recognition data is used for user authentication based on biometric recognition in the mobile payment.