"The bad guys are constantly adapting," he said. "They're always trying new things."
The worldwide communications industry is projected to lose $46.3 billion from fraud this year, roughly 2 percent of global revenue, according to the Communications Fraud Control Association. Taking over phone accounts is one of the top five frauds and is expected to cost carriers $3.6 billion this year.
To combat criminals, carriers have to become more flexible and be ready to adjust tactics as attackers change theirs. "Security is the art of war," Pingree said.
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