A computer device includes hardware with a connected peripheral device such as a camera or a microphone. An operating system is configured to operate the peripheral device using a device driver and a representative device object. An agent is configured to apply security attributes to the device object which permit access from a primary user account while preventing direct access to the device object by a secondary user account in a sandbox. The agent may intercept requests made toward the device object, examine each request, and then satisfy the request, when the request is allowed, by selectively arranging access to the device object from the sandboxed secondary user account.