Operating system drive layer-based scrambling method and device

The invention discloses an operating system drive layer-based scrambling method. The method comprises the following steps of: S1, receiving configuration information for scrambling program streams from a configuration module, periodically generating a key control word (CW) for the scrambling program data stream information, and sending the key CW to an entitlement control message generator (ECMG) module; S2, receiving an entitlement control message (ECM) packet returned by the ECMG module; S3, receiving filtering rules for program data stream information; S4, capturing and sending required network data streams of a fixed Internet protocol (IP) and a fixed port; S5, receiving the CW of the scrambling program data stream information, an ECM packet to be inserted into the data streams, and the network data streams of the fixed IP and the fixed port, so as to generate final encapsulated data streams; and S6, sending the final encapsulated data streams to an appointed target IP and an appointed target port. The invention further discloses an operating system drive layer-based scrambling device. With the adoption of the operating system drive layer-based scrambling method and the device, disclosed by the invention, data packets are directly captured and processed on the operating system drive layer, the rate of a single-channel code stream and the total input code are increased, and the practicality and the instantaneity of the scrambling device are further enhanced.