"Throughout the games, the same in London (in 2012) when you are the center of attention of the world, there are massive attempts everyday all day long to break our security," IOC spokesman Mark Adams told the Associated Press.
"We have it all year round anyway but it's particularly intense at the moment."
The IOC is coming under "regular attack," he said.
The Court of Arbitration for Sport warned earlier this week of attempts to break into its website. The sports court is overseeing doping sanctions at the Olympics for the first time.