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

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.

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