fallintoplace opened a new pull request, #1045:
URL: https://github.com/apache/arrow-go/pull/1045

   ## What changed
   
   Check the secure-random read used to generate Parquet AES nonces and stop 
encryption if nonce generation fails.
   
   ## Why
   
   The encryptor previously ignored the result of `crypto/rand.Read`. On Go 
versions where that function returns an error, encryption could continue with 
an all-zero or partially filled nonce. Reusing a nonce undermines the security 
guarantees of both AES-GCM and AES-CTR.
   
   The test uses a package-local random-read seam to inject an entropy failure 
without replacing the process-wide random reader. It covers both supported 
cipher modes.
   
   ## Validation
   
   `go test ./parquet/internal/encryption`
   


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