the so-called security, is that there is not danger from the abuse, not accident; the so-called prevention is preparedness, vigilance, and preparedness means to prepare to deal with victims of attacks or to avoid, alert is the preparedness and protection. 
Explained above, whether or not to give security under the definition as follows: to prepare and protection to deal with victims of attacks or to avoid, so that the object to be protected in no danger, free from abuse, there is no security of the state of the accident. It is clear that the purpose of security is to prevent a means, through preventive means to reach or achieve the purpose of security is the basic connotation of security. 

Security Products including cctc cameras, supervising quipment, alarm system, etc.