U.S. says that the Internet is its weak spot in security

Barack Obama's administration wants to take clear and concise advice to the population on one of the biggest threats to national security in homes and offices of the United States: the computer.
The government wants Americans to think about before you click the mouse and know who's on the other side of your instant messages, since what one does or says in cyberspace will remain there for many can see it, steal it or use it, whether against people or its government.
Internet today is the weakness of the U.S., said former National Intelligence Director Michael McConnell.
Speaking at a new exhibition on cybersecurity in the International Spy Museum in Washington, McConnell said the network "introduced a level of vulnerability that is unprecedented."

The Pentagon's computer systems are 360 million netizens by polling day and a major energy company has admitted that their networks are scanned up to 70,000 times daily, said cyber-security expert James Lewis.Mostly, these polls are benign infrastructure networks. Many are a nuisance but some are crimes, "said McConnell. The most dangerous are the surveys of espionage or sabotage of data.

The attackers might be terrorists who seek to attack the culture and the U.S. economy or foreign states that seek to insert malicious code into the grid to activate weeks or years later.
"We are the fat kid in the race," Lewis said. "We're the biggest target we have much to steal things and everyone wants to hurt us," he said.
The experts recommend steps to increase security at home include:

Use antivirus software, filter spam, adult material controls and firewalls.
Make frequent backups of important files on external drives.
Think twice before sending information over the Internet, especially when using wireless networks or public.