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With the continuous development of the field of computers, computer security has been a very serious challenges, especially in the area of ??information security. Computer security development process, the status of the intrusion detection showing an increasingly important trend, showing a variety of intrusion detection research, such as pattern matching, neural networks, and so on all the way, but these methods are only limited to software level, in terms of hardware, or very little. Less in terms of hardware development is constrained due to the limitations of the hardware development, such as hardware resources, re-use and low defects. With the introduction of the Linux operating system, hardware development, hardware development a different direction. Linux system with the kernel, and each module can be cut, use flexible. Use the Linux system can be reused various drivers in the Linux, as well as various compiler tools, software, etc., greatly reducing labor costs and the difficulty of hardware development. Extensive deep into a variety of applications in the development of the hardware. Particularly Linux system can be cut. It especially the core code modules and various functions separately, that is, according to their needs, add their own modules need to delete a module that they do not need, but also according to their needs. This advantage makes Linux more flexible hardware development, it makes the extended functionality of hardware development has become a possibility, hardware development like software development, do not have to re-complete the entire product at the same time be able to complete the system function increase, which also the dynamic expansion of the concept of hardware development. So, in hardware development, the combination of microcontroller with Linux hardware development of the range of product applications more widely, showing a faster and faster pace of development trends. Dynamic expansion in the hardware development is a relatively new concept, and also a few practical applications, especially in the development of intrusion detection hardware, and no product. So here, we have to do is study Linux and microcontroller to achieve intrusion detection hardware development, and further dynamic expansion of the puzzle. Computer development since the combination of Linux and microcontroller showed satisfactory results in the completion of the special function areas. So, is the best choice to complete this job in the microcontroller.
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