System, method, and device for playing back recorded audio, video or other content from non-volatile memory cards, compact disks, or other media

Abstract

A secure software package for original equipment manufacturers to run in electronic devices in order to access and dynamically decrypt encrypted audio video or other content from a memory storage device such as a memory card, optical or hard disk such that the user interface of the device need only send simple commands and the decrypted content is output.

1 . A method of securing a storage device and providing content to an authorized entity yet protecting the content from unauthorized duplication:
 providing a flash memory array within the storage device;   providing a freely accessible read/write area within the memory array, the freely accessible read/write area being a first distinct area;   providing a read/write area within the memory array that is accessible only after a successful mutual authentication between a host device and the storage device comprising the flash memory array has occurred, the read/write area within the memory array that is accessible only after a successful mutual authentication being a second distinct area within the memory array;   providing a write protected area within the memory array that is accessible only by the storage device itself, the write protected area being a third distinct area within the memory array;   providing a write protected area that is accessible for reading from outside of the storage device, the write protected area being a fourth distinct area within the memory array; and   storing the content in an encrypted format in the freely accessible read/write area.   
   
   
       2 . The method of  claim 1 , further comprising storing a media unique key in the write protected area within the memory array that is accessible only by the storage device itself. 
   
   
       3 . The method of  claim 2 , further comprising storing title keys necessary to access content in the freely accessible read/write area within the write protected area within the memory array that is accessible only by the storage device itself. 
   
   
       4 . The method of  claim 3 , further comprising:
 providing copy control information within the read/write area within the memory array that is accessible only after a successful mutual authentication; and   concatenating and encrypting the title keys and the copy control information together with the media unique key stored in the write protected area within the memory array that is accessible only by the storage device itself.   
   
   
       5 . The method of  claim 1 , further comprising storing a media identifier unique to each storage device within the write protected area that is accessible for reading from outside of the storage device. 
   
   
       6 . The method of  claim 5 , further comprising storing media key blocks within the write protected area that is accessible for reading from outside of the storage device. 
   
   
       7 . The method of  claim 6 , further comprising transferring the media key blocks from the write protected area that is accessible for reading from outside of the storage device to a portable device, the portable device having a key able to decrypt the transferred media key blocks. 
   
   
       8 . The method of  claim 7 , further comprising transferring a piece of the encrypted content from the freely accessible read/write area to the portable storage device, the portable storage device having an encrypted version of the title key used to encrypt the piece of the encrypted content. 
   
   
       9 . A system for providing and reproducing content for an authorized entity yet protecting the content from unauthorized duplication, the system comprising:
 a host device for reproducing the content;   a storage device comprising a flash memory array;   a freely accessible read/write area within the memory array, the freely accessible read/write area being a first distinct area;   a read/write area within the memory array that is accessible only after a successful mutual authentication between the host device and the storage device has occurred, the read/write area within the memory array that is accessible only after a successful mutual authentication being a second distinct area within the memory array;   a write protected area within the memory array that is accessible only by the storage device itself, the write protected area being a third distinct area within the memory array and having records ; and   a write protected area that is accessible for reading from outside of the storage device, the write protected area being a fourth distinct area within the memory array, the content being freely accessible but only reproducible if the host device can successfully mutually authenticate with the storage device and access the second distinct read/write area.