I believe that you should refuse using the AES encryption method. As you can seem, it doesnt succeed in protection of US government data.
This is one of the most advanced encryption algorithms. Believe me, the STEEL team is experienced and it wouldnt use the methods which wont work out or have turned out to be ineffective.
But i constantly hear the news about leakage of secret US government info, thats what made me doubting encryption quality.