Computer security can also be called IT security, and Network security. It is a specialized field of IT that involves securing networks, preventing unauthorized access, and fighting against cyber threats. Today’s most common threats consist of the following: viruses, worms, spyware, adware, hacker attacks, denial of service attacks, data interception and theft, and identity theft. Most dangerous once are international cyber-attacks. For example, “For almost two years, hackers based in Shanghai went after one foreign defense contractor after another, at least 20 in all. Their target, according to an American cyber-security company that monitored the attacks, was the technology behind the United States’ clear lead in military drones. The hacking operation, conducted by a group called “Comment Crew,” was one of the most recent signs of the ambitions of China’s drone development program. The government and military are striving to put China at the forefront of drone manufacturing, for their own use and for export, and have made an all-out push to gather domestic and international technology to support the program.”(NY Times, 09/20/2013, Edward Wong)
The example mentioned above is one of the simplest attacks on US industrial data. There were major attacks like: breaching the Pentagon data and obtaining important information about US military secrets. The US government established departments called cyber-police; their main job is to fight against cyber-crimes. For example, these people can be from police department or government’s secret service agencies. Cyber police catch hackers, people who steal identity on the internet, child predators and many more. Also, law enforcement agencies work with giant computer manufacturing companies to fight against cybercrime. For instance, "Microsoft employees, accompanied by United States marshals, raided two nondescript office buildings