With the ever greater development of technology of malicious code, malware has been becoming one of the most serious threats to information security. And since the encryption and transformation of program code lead the traditional signature scanning not so instantaneous and effective any longer, researching a new method of detection of malicious code has no time to delay. In recent years, although the technology of detection of malicious code, especially behavior oriented detection, has made a great progress rapidly, it also faces great challenges and problems to be overcome. This paper is a detailed overview of this behavior oriented detection of malicious code including architecture, variety and development tendency of this technology, furthermore it provides the next researcher key points.

For the past few years, the Location-Based Service (LBS) is becoming more and more important for people's life. On the one hand, it is easy to told people that where is they are anytime, On the other hand, the privacy of location issues attract more and more attention. This paper analyzes the key problems of location privacy protection, and gives a survey of existing work including the model of privacy protection, the anonymous model and the system architecture; finally, some open issues are given.