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Seeing (surveillance) but not understanding (poor security performance)" is common problem in most security systems. Although in recent years significant progress has been achieved in biometric identification technology, the progress of single technologies does not dramatically improve the overall performance or solve the system-level problems of social security. Currently in addition to improvements...
For a security system, the risk assessment is an important metric to judge whether the protection effectiveness of a security system is good or not. In this paper, the security systems deployed in a guard field are regarded abstractly as a diagram of security network. Firstly a method about risk assessment based on entropy theory and Neyman-Pearson criterion is proposed. Secondly, the most vulnerable...
In recent years more and more cities are planning to construct crime preventing systems in order to reduce the loss caused by risks. There are many kinds of crime preventing systems with different variety and price in the market so far. It is the problem that each decision-maker faces jointly that how to select a crime preventing system for a city which would be a perfect fit. From the stand point...
With the rapid development of industrialization and urbanization, security situation becomes more and more serious in China. Many cities have established security systems in order to maintain social stability. Although various security facilities have played a positive role in the field of social security prevention, there are some defects with poorly designed and personnel protection, physical protection,...
The AVS-S standard for security industry requires its audio information must have tamper-proof capability. We researched the fragile watermarking based on mean quantization principle and implement it in AVS-S audio coding. Firstly, a binary image was embedded into audio as the watermarking. The audio with watermarking should have no significant quality decrease. Then attack the audio sequence with...
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