Keyed lock on both inside and outside

A home owner from NY says:

The new Andersen sliding door I have currently has a thumbturn on the inside and nothing on the outside. I would like to install keyed locks on both sides. Both inside and outside will need a key to open. (I don't want my kids to open the door from the inside and go to the back unsupervised.)

Will I need to purchase and install BOTH 82-316 and 82-317?

Then re-key one of the locks to match the other?

Is the key pretty standard? A local locksmith will have a blank?
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Tom from SWISCO responded:
Unfortunately, I don't think you would be able to install the 82-316 and 82-317 together. That is not how they were meant to be used. We also cannot recommend trying, since a lock on both sides of a door could create a fire hazard.
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