Digital document is important aspect in the business. It contains critical company data such as supplier data, production data, financial data, client data, etc. Digital document in the company can be freely accessed using media data share. Sharing the confidential digital document is prone to leakage. The leak can cause company loss. To prevent leakage of digital documents especially from the insider, we need to insert specific information into each digital document that is copied by employee. The digital document is secured by using FUSE to insert additional information in a transparent way and Samba File System as a medium to share data. When there is document leakage, the company can track who and when is the document copied. Based on the experimental result, insert additional information into digital document can track the document leakage.