Cloud security is set to grow into a $1.5bn market by 2015 to make up nearly 5% of IT security technology spending, according to Forrester analyst Jonathan Penn.
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Cloud represents such a disruption for security, which Penn details in a report entitled Security And The Cloud.
Until now, the focus has been on security software-as-a-service (SaaS), but that is too narrow and is "missing the forest for the trees", he wrote in a blog post.
With the rest of IT, which is about 30 times the size of the security market, moving to the cloud, the security market will have to change and grow to address this challenge, said Penn.
Many more businesses are now demanding that security be built-in to cloud services, and according to the report, this market-driven requirement for cloud computing adoption will, over the next five years, see the emergence of highly secure and trusted cloud services.
"Developing solutions for cloud environments requires a lot more than scaling up and supporting multi-tenancy. But heightened pressure by cloud customers and prospects is fuelling the rapid evolution of solutions," wrote Penn.
By 2015, security will shift from being the top inhibitor of cloud to one of the top enablers and drivers of cloud services adoption, he said.