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To my understanding in a 1-n Oblivious Transfer the Sender has some Values $X_1...X_N$ and the receiver wants to retreave some $X_I$, with $1 \le I \le N$.

Can one now somehow guarantee, that the Receiver has the permissions to retreive said $I$? Assuming every receiver has some rights to receive exactly one certain $I$, and no other Receiver has them. I think keeping the possible $I$ values secret would be insecure and not an option.

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