According to the fastener chain, method and apparatus for forming ends thereof, coil-shaped fastener elements as linear fastener elements are attached and sewed to side edge portions of a pair of fastener tapes with sewing yarns as fixing yarns while a core thread is inserted through the fastener elements. The work machine comprises a chassis that has at least four wheels that belong to a wheel axle, in pairs. Files identified as containing the selected pattern may be further analyzed to determine the likelihood of the presence of sensitive information.