cyber security

                                                         CYBER SECURITY   cyberspace is as vulnerable as much as it is a vital infrastructure.The threat is real.US president obama recently declared that "cyber threat is one of the most serious economic and national security challenges we face as a nation"and that "America's economic prosperity in the 21st century will depend on cyber security."the same is true for other nations as well.Private and public cyber infrastructure in the united states falls under nearly constant attack, often from shadowy sources connected to terrorist groups, organized crime syndicates,or foreign governments.   Trojan horse- program that performs some ostensibly useful function but contains ,lurking within its code,a damaging instruction set.often,that instruction set will enable a remote user to assume co...