Abstract: The development of pervasive computing accelerates the innovation of computing model, but the challenge of security has become the bottleneck in its development. Information security played an important role in the normal work of pervasive computing system based on embedded control. Due to the possibility of private information leakage in covert channels, the research on covert channel technology to avoid the perimeter security has not been paid enough attention. A new the secret channel security technology based on wireless sensor was proposed, in a way that cannot be detected by other systems, to optimize the parameter data of wireless sensor, to realize the secret channel transmission in the way of data encryption, to ensure the information security of pervasive computing system, has a certain practice and guidance significance.

Key words: wireless sensor, pervasive computing, covert channels, security