Abstract
In this paper we design a new protocol for confidentiality which can be applied in three scenarios. The first scenario does not need too many database modifications. We found that this protocol can offer a confident method for registration and all other messages between master/mode II devices and TV white space database (WSDB). The second scenario is tried to overcome of the delay of the first scenario registration, by let the Master mode pick a random number (Info_Number) and the answer of this number (Info_Value) and put it in the REG-REQ before send it to the WSD. But this needed a modification in the REG-REQ. The third scenario is needed another modification in the WSD by adding a new tow columns we call it MasterID and Password and then give any Master mode a MasterID and Password and the registration will need two steps, first one the Master sending its MasterID and the password, and the second step must use either Scenario 1 or Scenario 2.