<PackageReference Include="BouncyCastle.Cryptography" Version="2.6.0" />

Org.BouncyCastle.Crypto.Prng.Drbg.ISP80090Drbg

public interface ISP80090Drbg
int BlockSize { get; }

int Generate(byte[] output, int outputOff, int outputLen, byte[] additionalInput, bool predictionResistant)

void Reseed(byte[] additionalInput)