Method and Apparatus for Coding Information

A multimedia encryption method for a portable device, comprising the steps of:

• storing prerecorded content on an SD or MMC memory card which contains a unique card key which is stored in a protected area of said card;
• storing a player key within a portable device internal memory, wherein said player key is modified by said unique card key to produce a new key;
• and
• encrypting said content with said new key prior to storing said content in said memory card;
• wherein multimedia encoded in said multimedia file format on said memory card is protected from unauthorized copying using a highly secure encryption algorithm;
• and
• wherein content cannot be copied onto another memory card and played back without knowledge of said player key, said card key, and said encryption algorithm.

A multimedia encryption method for a portable device, comprising the steps of:

• encrypting downloaded content with a separate player key, wherein said player key is modified by a unique player ID;
• uploading said player ID to a content server prior to downloading content;
• after downloading, copying said content onto an SD or MMC memory card;
• wherein multimedia encoded in said multimedia file format on said memory card is protected from unauthorized copying using a highly secure encryption algorithm;
• and
• wherein said content cannot be copied onto another memory card and played back on a different portable device without knowledge of said player key, a new player ID, and said encryption algorithm.