A Symmetric PIR scheme $($henceforth SPIR$)$ is a PIR scheme where, at the end, Alice learns nothing more than x$\_$i$.$

We will allow the databases to share a common random string; however, the length of that string will be one of ourparameters.

Is the Quadratic Residue based Computational Private infotmation retreival protocol a symmetric private information protocol.Prove it either way mathemtically.