In essence, this is the challenge that VMware and EMC's RSA division intend to confront. As such, the pair's efforts are aimed directly at securing enterprise's internal clouds, external clouds hosted by traditional service providers and "private" clouds that blend internal and external IT resources. Almost by definition, this vision of the future of cloud computing (with VMware's vSphere as its foundation) will require highly robust, flexible and scalable security solutions in order to succeed.