It does not explain why Mr. Quinn allegedly sought to penetrate that computer or what he did once he gained access.
What isn't widely known is that during the general election hackers managed to penetrate our computer systems...
But Northrop Grumman spokesman Randy Belote acknowledged the company "is experiencing greater numbers of attempts to penetrate its computer networks" and said the firm is "vigilant" about protecting its networks.
To penetrate sensitive computer networks, attackers can use spear phishing to sidestep technical security mechanisms by exploiting the privileges of careless users.
Mr. Wessel, who also criticized the Chinese company Lenovo's acquisition of I.B.M.'s personal computer business three years ago, pointed to reports this month that Chinese hackers had tried to penetrate military computer systems at the Pentagon and in Britain.
Hackers mostly backed by the People's Liberation Army are trying daily to penetrate the computer systems of U.S. government agencies, defense contractors, technology firms, and utilities such as power and water companies — not to mention the private e-mail accounts of thousands of Americans.
The national parties are furious with the states for jumbling the nomination process.Hacked offChina denied, as a reflection of a "cold-war mentality", reports that its armed forces were behind "cyberattacks", in which hackers had tried to penetrate the computer network of the Pentagon.
The newspaper writes that according to a National Intelligence Estimate, the United States is the target of "a massive, sustained cyber-espionage campaign" and that China is "the country most aggressively seeking to penetrate the computer systems of American businesses and institutions to gain access to data that could be used for economic gain".
The attack was designed to penetrate a computer through the internet, before targeting other machines on the same network that were not directly connected to the internet.
In a long-running campaign, the attacks continued and the hackers methodically worked to penetrate the computer networks of these firms.
Governments don't need Stuxnet-level skills to be able to successfully penetrate sensitive computer networks and degrade or deny their services.
