Denial-of-service attacks are growing faster than bandwidth is being added to the internet, according to VeriSign, the company that administers the .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, according to VeriSign.

The company claimed that a successful denial-of-service (DoS) attack against VeriSign could bring down the internet. “There are attacks attempting to shut down our servers,” said Ken Silva, VeriSign’s chief security officer. “This would effectively shut down the internet.”

Read more: ZDNet.co.uk