public string Protect(AuthenticationTicket data)
{
DateTime notBefore = DateTime.UtcNow;
DateTime expires = notBefore + TimeSpan.FromHours(1); //validity timer.
SigningCredentials cred = new SigningCredentials(); // your signing credentials.
JwtHeader header = new JwtHeader(cred);
header.add("x5t", "your value");
JwtPayload payload = newJwtPayload(ConfigurationManager.AppSettings["Issuer"], data.Properties.Dictionary["audience"], data.Identity.Claims, notBefore, expires);
payload.add("x5t", "your x5t to json property");
var jwtToken = new JwtSecurityToken(header, payload);
var handler = new JwtSecurityTokenHandler();
var jwt = handler.WriteToken(jwtToken);
return(jwt);
}