Physical document validation with perceptual hash

Validation requirements documents electronically is not only needed for electronic documents. For the specific needs of the physical document validation also needs to be done electronically. existing problems, physical documents will always have a different hash values each time digitized. Through this research is reviewed whether perceptual hash can be used for electronic validation of the physical document. The resulting conclusion of this study, perceptual can hash to use and can detect all modifications that occur in the main information document.