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Cloud computing improves utilization and flexibility of allocating computing resources while reducing the infrastructural costs. However, cloud technology is still proprietary in many cases and is tainted by security issues rooted in the multi-tenant environment of the cloud. For instance, the virtual machines of two competing companies could be served by the same underlying host machine in an Infrastructure as a Service (IaaS) type of cloud and this represents a security threat to be addressed. As a solution to this multi-tenancy problem, the Host Identity Protocol (HIP) offers a standardized way to authenticate and protect data flows between tenants belonging to the same security domain.
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