D-Security(Document Security System, developed by W&Jsoft Inc.) is an endpoint document security system for enterprises. D-Security provides features including, transparent file encryption, permission control, content protection, access log and audit reports. D-Security Viewer is a mobile client for D-Security system. It can communicate with D-Security to access documents file repositories, decrypt the cipher context, display and protect the content of files base on permission control. W&Jsoft