> > What makes you think the data is buffered on disk? > thats what i have learned . as far as we have studied , the file from pen drive will be first copied to a buffer and we will be viewing and editing those buffer files , which will be finally put back to pen drive > And even if it was (it's not) why would you have more permissions to that > buffer than to the mounted pen drive? we are just trying to prove that data can be copied from that buffer to another location without the knowledge of user, in short , we steal the data -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html