<PackageReference Include="System.ServiceModel.Primitives" Version="6.1.0" />

System.ServiceModel.Security.TransportSecurityProtocol

class TransportSecurityProtocol : SecurityProtocol
public TransportSecurityProtocol(TransportSecurityProtocolFactory factory, EndpointAddress target, Uri via)

protected void AttachRecipientSecurityProperty(Message message, IList<SecurityToken> basicTokens, IList<SecurityToken> endorsingTokens, IList<SecurityToken> signedEndorsingTokens, IList<SecurityToken> signedTokens, Dictionary<SecurityToken, ReadOnlyCollection<IAuthorizationPolicy>> tokenPoliciesMapping)

protected virtual Task<Message> SecureOutgoingMessageAtInitiatorAsync(Message message, string actor, TimeSpan timeout)

protected virtual void VerifyIncomingMessageCore(ref Message message, TimeSpan timeout)