This paper introduces a new security solution regarding security documents with secure unique information. Our newly proposed security measure enables outputting ID documents by commercially available printer. On this basis, a citizen can apply and accept his ID certificates to and from Issuing Authority via website. A unique gradational latent image emerges if a third party authenticates it under Infrared ray. The principle of this new measure lies in the complicated microstructure generated by our specially designed software. It is understood that its security feature based on secure software and wide applicability for commercially available printers show profound potentiality to construct new security system for ID documents in IT society.