It is said that Dual EC DRBG has a backdoor given the values of the curve. Hence some people do not trust it.
With that in mind, some people also distrust NIST P-256 Curve. Why? Is it purely because it’s from NIST? Is it the same curve as Dual EC DRBG? Or is it merely by association? Does P-256 use Dual EC DRBG? Or can you use any Cryptographically Secure PRNG?