Denial of service attacks are growing faster than bandwidth is being added to the internet, according to VeriSign, the company that administers the dot-com domain.
Criminal groups selling services online are increasingly threatening the fabric of the internet, as the size of the compromised networks of computers they control increases, VeriSign said.
The company claimed that a successful denial of service (DoS) attack against VeriSign could bring down the internet. Ken Silva, VeriSign's chief security officer, said: "There are attacks attempting to shut down our servers. This would effectively shut down the internet."