logy to solve several important engineering problems, especially in the security field ofcommunication. In thepreviousreports[4–6], the authorsused thecontinuouschaotic systems withwell-designed synchronization controllers to achieve the secure communication. However, in practical circuit implementations for continuous chaotic systems, analog components, such as operational amplifier (OPA), resistors, capacitors are necessary. Unfortunately, these analog components are sensitivetoenvironmentalconditionsandoftenresultincircuitinstability. Ontheotherhand,owingto theprogressofmicrocontrollerswithdigitalsignalprocessing(DSP)technology,usingmicrocontrollers to replace the analog circuits has become more and more popular and important. Discrete chaotic systems implemented by the microcontroller are more robust and less susceptible to temperature variation and component aging but also at a lower price. Therefore, to solve the problem of instability of analog circuits, we need to study the discrete chaotic systems realized by microcontrollers. Until now, the applications of discrete chaotic systems to solve image encryption have been proposed in References [7,8]. However, the synchronization control problem of discrete chaotic systems has not been well solved in these studies. In addition, to the best of our knowledge, using discrete chaotic systems to design the synchronized large-scale CRNGs has not been well discussed. Furthermore, recently, due to the advent of quantum computers, many traditional encryption methods may become unsafe. The encryption can be quickly cracked by quantum computers. Because the chaos system has rich dynamic characteristics, it can generate a large amount of random signals in a very short time and many scholars have pointed out that chaotic encryption method may be one of the solutions against the attack of quantum computers [16,17].