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Content Security Features in Usbccgp.sys

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Digital Rights Management (DRM) systems often make use of device serial numbers to ensure that legitimate customers have access to digitized intellectual property. If a USB device has a CSM-1 content security interface, a client driver can query for its serial number by sending an IOCTL_STORAGE_GET_MEDIA_SERIAL_NUMBER request to the generic parent driver.

USB Generic Parent Driver (Usbccgp.sys)
Microsoft-provided USB drivers