  Because quantum computers are expensive, it is envisaged that individuals who
want to utilize them would do so by delegating their calculations to someone
who has a quantum computer. When quantum computer users delegate computations
to quantum servers, they wish to keep information about their calculations
hidden from the servers. The protocol of delegating a calculation while hiding
information about the calculation from the server is called {\sl blind quantum
computation protocol}. Prior research on single-server's blind quantum
computation protocol required users to have quantum capabilities. Prior
research on multiple-servers' blind quantum computation protocols required
users to have just classical capabilities but imposed limits on the
server-to-server communication. There are no known single-server blind quantum
computation protocols with a classical user and multiple-servers blind quantum
computation protocols that allows servers to communicate freely with each
other. We show that the existence of these protocols is equivalence.
