AirPort as an extender for cisco router but with different encryption

I am trying to get my apple tv 3 to work with my universities wpa2 enterprise authentication with no success. I am thinking of getting an airport express, plugging it into the ethernet outlet that the cisco wireless currently uses, to retransmit wifi in a lower encryption and thus works with the apple tv. If I plug the airport express into the ethernet outlet will it be able to retransmit the wifi with a lower encryption or will it just retransmit in the wpa2 enterprise again.

AirPort Express

AirPort Express

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