According to new research from Gartner, the cloud-based security services market will be worth $2.1 billion in 2013, rising to $3.1 billion in 2015.

"The cloud-based security market remains a viable one, offering providers many opportunities for expansion," Gartner research director Ruggero Contu said in a statement. "Encryption will be a new area of growth, but it remains a complex activity. The strongest interest will be in encryption products from cloud security brokers, which are relatively easy to deploy and have options for on-premises encryption management."

Gartner predicts that the top three most sought-after cloud services moving forward will be e-mail security, Web security services and identity and access management (IAM) -- though in 2013 and 2014, the highest growth is expect to occur in cloud-based tokenization and encryption, security information and event management (SIEM), vulnerability assessment and Web application firewalls.

"The benefits of deploying cloud-based security services are clear," Gartner principal research analyst Kelly Kavanagh said in a statement. "Aside from the broad area of IAM, specific controls, such as encryption, are becoming vital to the adoption of cloud computing. They are further helping to generate interest in this particular form of security service delivery."

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