the invention describes a novel method for securing authentic client access to online confidential resources by means of a physical hard key / card device , which does not need a custom card reader , but uses the optical disc drive of any remote computer to conduct a highly secure online transaction on the internet such real online card key device can be read by an optical disc drive of a computer , without allowing any of the file viewing , copying and editing functions . such rock device can be used as a real world physical hard key for accessing secured networks and conducting secure online transactions . it can also be used as a fully functional versatile credit card with additional magnetic stripe and manual authentication methods available on the non - reflective surface of the optical disc based rock optical disc card of the present invention .