Silicon as a Service (SiaaS) is a service model for serving hardware Silicon. For example, a CPU chip may have different capabilities to be offered as a service for pay per use consumption model or licensed activation model. Three major driving forces for SiaaS shift are “reducing entry barrier on cost”, “increasing flexibility on access”, and “prolonging life cycle on product.” Often, the products we buy are used occasionally, a great waste of both money and occupied space. More importantly, with the rapid growth of world population, product ownership by all is simply not sustainable for the limited resources and higher manufacturing cost. Sharing becomes a necessity. Furthermore, we value and celebrate our unique individuality. We have different interests and taste; hence we demand different kinds of services. The products we own can become obsolete and be rendered useless over time. Yet we want continuous service and stay up to date with all latest and greatest features [1]

A binary coding method was invented and has been applied to the single-key-lock (SKL) system which achieves access control by associating with each accesser only one key and with each resource only one lock. The new system is called the binary single-key-lock (BSKL) system. In both the SKL and BSKL systems, through operations on the single-key-lock pair, the control information can be revealed. On the basis of the new binary coding method, and because binary operations are much faster, better performance for such an access control system can be achieved. The increased extensibility of the modification is also discussed.>

The G-K-D tree (generalized K-D tree) method aims at reducing the average number of data page accesses per query, but it ignores the cost of index search. The authors propose two adaptive algorithms that take into consideration both data page access cost and index page access cost. It attempts to find a minimum total cost. Experimental results indicate that the proposed algorithms are superior to the G-K-D tree method.>