System-on-chips and operation methods thereof

A system-on-chip comprising:

• a magnetic random access memory configured to include a plurality of memory areas, the magnetic random access memory configured to store, in response to a command signal and an address signal, encrypted data in the plurality of memory areas based on the address signal;
• at least one processor configured to execute computer-readable instructions to
• divide the magnetic random access memory into the at least three memory areas,
• output the command signal, the address signal, and a level information signal, the level information signal setting a security level of each of the at least three memory areas, and
• input and output data;
• and
• a security interface configured to
• selectively convert data received from the at least one processor into the encrypted data having the security level associated with the address signal, the security level based on the level information signal, by performing a randomization operation on the received data in response to the address signal indicating an address of a particular memory area of the at least three memory areas, and
• output the encrypted data to the magnetic random access memory.