The latest articles on DEV Community by Mortadha92 (@mortadha92). https://dev.to/mortadha92 https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F385403%2F4c00af73-8476-4134-8c42-37e326471414.png https://dev.to/mortadha92 en Mortadha92 Wed, 13 May 2020 12:02:24 +0000 https://dev.to/mortadha92/how-to-detect-a-modified-pdf-file-4p53 https://dev.to/mortadha92/how-to-detect-a-modified-pdf-file-4p53 <p>Hi,</p> <p>I worked with binary PDF structure  (I found that there is an ID key , it change when we update the PDF , but my problem still unsolved when we compress pdf (do the optimization : reduce file size , a new ID key ) so I’m searching if there is a solution or I should transformer pdf to image and maybe  with OCR  I will detect the fraud ? </p> python xml pdf machinelearning