This new patent is a component of Liquid Audio's Secure Portable Player Platform (SP3), a licensable technology that enables consumer electronics companies and chipset manufacturers to create portable devices that playback digital audio in accordance with the rights and business rules of content owners.
According to the company, its SP3 technology provides a digital rights management (DRM) system that allows for authorised playback of digital content on either internal or external memory; sharing of content between authorised playback systems; unauthorised tampering of content meta data; and relocation and renewal of security keys on a device. Companies currently utilising SP3 include ARM, AIWA, Cirrus Logic, Hitachi, I-O Data, Mpuls3, Palm, Sanyo, TDK and Texas Instruments.