The problem of verifying the authenticity of a given certificate can be affected by additional circumstances other than the presence of a rogue CA. For instance, a host name can map to different servers, each with a different certificate and different CA chains, due to their dependence on different jurisdictions. Also, it is possible for a CA chain to change at any time, and this is out of the control of the administrators of the site. There is a proposal called certificate transparency [12], which tries(พยายาม) to make the certificates that a certain CA has issued auditable and easy to track