<PackageReference Include="BouncyCastle.Cryptography" Version="2.6.2" />

IEncapsulatedSecretExtractor

public interface IEncapsulatedSecretExtractor
namespace Org.BouncyCastle.Crypto { public interface IEncapsulatedSecretExtractor { int EncapsulationLength { get; } byte[] ExtractSecret(byte[] encapsulation); } }