A portable security system. The portable security system includes a wheeled trailer and a telescopic mast that is coupled to the trailer. The mast is pivotable between a first generally horizontal retracted position and a second generally vertical extended position. A cabinet is mounted onto the trailer and houses a control subsystem, a data input subsystem, a data server and a data storage subsystem. At least one input device is connected to the data input subsystem. The data input subsystem receives data from the input device and forwards the data to the data storage subsystem for storage by means of the data server.