I had the same thing happen when I asked it to summarize potential attacks on a cryptographic hash function. It said it refused to help because of the security importance of the function. It's really worrying. Whoever has unrestricted access to it has a huge power advantage in speed of accessing information over people who don't. And who decides? It seems like lawyers, bureaucrats, and extremely online academics are who makes that decision. I am a mere pleb I guess who can't handle such information.