Key to the concept is something Microsoft called a "security module," embedded either in the hardware or provided as software, that would meter the computer's usage. "To make this model successful, a mechanism must be in place that supports a highly secure method of adjusting performance coupled with a secure, auditable measurement and payment scheme to allow a variety of pre-paid and post-paid mechanisms for capturing and settling highly granular, infinitely adjustable, performance variations," the patent application said.
The security module would also lock the PC to a specific supplier, perhaps an ISP, much as a subsidized cell phone is locked to a specific mobile carrier for the life of a contract. "The metering agents and ... the security module allow an underwriter in the supply chain to confidently supply a computer at little or no upfront cost to a user or business, aware that their investment is protected and that the scalable performance capabilities generate revenue commensurate with actual performance level settings and usage," said Microsoft.
