The purpose of the present invention is to provide a security particle and an application method thereof. A process is simple. It is easy to control the shape, thickness, or diameter of the security particle and to form a micro-code inside. The identifiability for the micro-code can be improved by providing the light-sensitive characteristics to the security particles in a simple way. The present invention provides the security particle with the micro-code with optical properties different from the outside or with the empty inside by exposing a photocurable polymeric resin with a photoinitiator to an optofluidic lithography system without a mask and the application method thereof.
