Abstract: The present invention discloses a digital content security system and a method that combines information provided by both of a content provider server and a portable steering device to establish multi-way protections of the digital content from reproduction and/or playing of other unauthorized device and hacked intercept of a private key for decrypting the digital content. In application, the portable steering device has a higher compatibility with various network platforms including, for example, any common computer using a Window media player built therein.

Abstract: An electrical signal converting system includes a housings a transmission interface slot group disposed on the housing, an OTG controller, and a system circuit. The transmission interface slot group is used for accommodating a first electrical memory card storing data consistent with a first storage standard. The OTG controller is used for accommodating a second electrical memory card storing data consistent with a second storage standard. The system circuit is used for converting the data consistent with the first storage standard into the data consistent with the second storage standard.

Abstract: An electrical signal connection system including an electrical signal transferring module for transferring electrical data between an electrical memory card and an electrical device is provided. Each side of the electrical memory card has a set of data transmission pads, and each set of data transmission pad has a plurality of output pins and an identification pin. The electrical signal connection system includes at least a casing, a plurality of receiving ends, an identification receiving end, and a plurality of signal output ends. The plurality of receiving ends disposed at a first end of the casing, for electrically connecting to the plurality of output pins of the electrical memory card. The identification receiving end disposed within the first end of the casing, is used for electrically connecting to the identification pin of the electrical memory card.