This is particularly important for financial institutions, he added.
"If I'm a hacker, it's reasonable for me to expect that it will be harder to break into a top-five financial institutions, than into a medium-sized company that provides services to to financial institutions," he said. "And if I get into a vendor that providers access to twelve banks, then I get access to twelve banks' data as opposed to one."
Keller said that he doesn't expect the number of breaches to go down immediately as a result of the new regulations.
"With all due respect to security professionals, I think that it's reasonable to expect reported incidents to go up, only because of the time it takes to go in and make substantial improvements to security controls," he said.
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