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

Org.BouncyCastle.Tls.DtlsVerifier

public class DtlsVerifier
Implements cookie generation/verification for a DTLS server as described in RFC 4347, 4.2.1. Denial of Service Countermeasures.
namespace Org.BouncyCastle.Tls { public class DtlsVerifier { public DtlsVerifier(TlsCrypto crypto); public virtual DtlsRequest VerifyRequest(byte[] clientID, byte[] data, int dataOff, int dataLen, DatagramSender sender); } }