Abstract: A System for providing data security in a first device driver operably installed in a computer operating system having a layered plurality of device drivers (81, 82, 83, 84) for accessing data in a data storage device. The first device driver detects an I/O request, and determines whether the first device driver is functionally uppermost in the layered plurality of device drivers. If the first device driver is functionally uppermost in the layered plurality of device drivers, the method performs the I/O request (80) in the first device driver. If the device driver is not functionally uppermost in the layered plurality of device drivers, the method denies the I/O request in the first device driver, and allows the I/O request to be performed by the next lowest-level driver in the layered plurality of device drivers.

Abstract: A registry monitoring method particularly applicable to a system (100) in which protected data is transmitted to a recipient computer. The method comprises requesting a handle for a registry key to a calling process, requesting a registry key value for the handle, modifying and deleting keys and values of protected data locations, and obtaining security clearance to complete the requests by checking secured process lists and rejection lists. Also included are a registry monitoring system, a secured data transmission system including registry monitorings, a machine-readable medium comprising a program to monitor a registry (110), and a computer configured to monitor a registry (110).