In response to adversaries who label his feats as "script kiddie" exploits, Calce said some people just "don't know what they're talking about" when it comes to Yahoo! or CNN networks. "We're talking about high-profile networks here. These aren't kiddie servers," he said.

A lot of people will instantly stamp any type of denial-of-service as a script kiddie maneuvre because you are mass scanning and need to acquire a lot of computers under your control, Calce explained.

But script kiddie attacks normally entail pushing one button and having an automated script doing everything for you, he noted. "I manually built the whole network," he said.

Calce advised critics to read his book.

"It was a well-co-ordinated attack, it was one of the first to be done and it was anything but a script kiddie attack," he said.