A device for securely recording protected content to a portable memory, and for reading the protected content therefrom. The device includes a feature that makes it adapted to read or write specially-configured portable memories that are incompatible with standard read/write devices. For example, the...http://www.google.com.hk/patents/US7266660?utm_source=gb-gplus-share專利 US7266660 - Protection of content stored on portable memory from unauthorized usage
