A method and system for merging mobile gift cards is described. When crystallizing a non-single-crystal semiconductor thin film by irradiating laser beam thereto, irradiation light beam to the non-single-crystal semiconductor thin film have a light intensity with a light intensity distribution which cyclically repeats a monotonous increase and a monotonous decrease and a light intensity which melts the non-single-crystal semiconductor. The selected configuration of the configurable one-time authentication token must always enable a forward-secure pseudorandom number generation feature for the one-time authentication token and at least one additional selected token feature. The second X-ray radiation source is turned on for scanning the central portion of the body.