public class CreditCardTokenParameters : SecurityTokenParameters
{
    public CreditCardTokenParameters()
    {
    }

    protected CreditCardTokenParameters(CreditCardTokenParameters other)
        : base(other)
    {
    }

    protected override SecurityTokenParameters CloneCore()
    {
        return new CreditCardTokenParameters(this);
    }

    protected override void InitializeSecurityTokenRequirement(SecurityTokenRequirement requirement)
    {
        requirement.TokenType = Constants.CreditCardTokenType;
        return;
    }

    // A credit card token has no cryptography, no windows identity, and supports only client authentication.
    protected override bool HasAsymmetricKey 
    { 
        get { return false; } 
    }
    
    protected override bool SupportsClientAuthentication 
    { 
        get { return true; } 
    }
    
    protected override bool SupportsClientWindowsIdentity 
    { 
        get { return false; } 
    }
    
    protected override bool SupportsServerAuthentication 
    { 
        get { return false; } 
    }

    protected override SecurityKeyIdentifierClause CreateKeyIdentifierClause(SecurityToken token, SecurityTokenReferenceStyle referenceStyle)
    {
        if (referenceStyle == SecurityTokenReferenceStyle.Internal)
        {
            return token.CreateKeyIdentifierClause<LocalIdKeyIdentifierClause>();
        }
        else
        {
            throw new NotSupportedException("External references are not supported for credit card tokens");
        }
    }
}