I am surely not an expert on the field, but I heard some people say that NIST P-256 somehow has backdoors. I don't know about the seriousness of this claim; maybe it's just a conspiracy theory.
If there is some truth to the hearsay, why is NIST P-256 still implemented? Almost everyone I asked said it's a bad idea to use P-256. If this is true:
- Why is it still in GPG (as of 2017)?
- Does it have any use (expect legacy and compatibility)?
- Is it really broken to the point to be unsafe to be used, in a professional environment?