A method and apparatus for processing enhanced uplink scheduling grants are disclosed. The circuit includes multiple hash function sub-circuits, each of which applies a respective hash function to an input key, producing a hash value. At least one of the information items has associated classification data profiling the information therein. The plurality of marks is provided on at least one of the first face and the second face and formed at a predetermined interval, and adapted to reflect or intercept the light emitted from the light emitter.