tustvold commented on issue #7373:
URL: https://github.com/apache/arrow-rs/issues/7373#issuecomment-2789353703

   This might be unwanted complication, but having done a quick scan through 
the parquet encryption code I was a little surprised that the interfaces are in 
terms of explicit keys at all, I would have perhaps expected an interface where 
the manner in which ciphertext gets generated/decrypted was opaque to the 
internal parquet machinery beyond propagating key metadata. This would allow 
using mechanisms like HSMs or external key stores to handle the key material, 
without that material ever being visible.


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