Embodiments herein disclosed provide for computer network security and, more specifically, monitoring application-based access to secure data and monitoring predetermined actions conducted on applications to determine abnormal access or abnormal actions. Specific embodiments of the invention provide for improved database which implements time period-structured tables and file directories. Such structuring of the database provides for automated data purging, backing-up of data and data recovery. Additional embodiments provide for tracking data attributes related to the monitored data, such as the quality of the monitored data, the quality of the monitored data and the origin of the monitored data. In addition, embodiments provide for validating the source of the monitored data to assure that data is received from a valid application.