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.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation of U.S. patent application Ser. No. 10 / 006,554 filed Dec. 6, 2001 to Farshid Sabet-Sharghi et al., entitled “System, Method, and Device for Playing Back Recorded Audio, Video or Other Content From Non-Volatile Memory Cards, Compact Disks, or Other Media”, which claims the benefit of U.S. Provisional Patent Application Ser. No. 60 / 251,731 filed Dec. 7, 2000 to Farshid Sabet-Sharghi et al., entitled “Secure Software System for Playing Back Recorded Audio, Video or Other Content From Non-Volatile Memory Cards, Compact Disks or Other Media”.[0002]This application is related to U.S. Pat. No. 7,227,952, issued on Jun. 5, 2007 to Bahman Qawami et al. entitled “System, Method, and Device for Playing Back Recorded Audio, Video or Other Content From Non-Volatile Memory Cards, Compact Disks or Other Media” and application Ser. No. 11 / 809,222 filed May 31, 2007 to Bahman Qawami et al., entitled “System, Method, and ...

AI Technical Summary

Benefits of technology

Enables secure playback of encrypted content on a wide range of devices with limited processing power, reducing unauthorized copying by isolating encryption keys and dynamically managing decryption exposure, thus protecting copyrighted material.

Problems solved by technology

Encrypted content is difficult to access, and memory cards or compact disks with encrypted content each have specific structures that require specific commands and routines to access encrypted and unencrypted content.

Additionally, computationally demanding portions of the software, such as the encryption and decryption (security) engine may be executed by the DSP, while other portions of the software may be executed by another microprocessor or an ASIC.

The encryption and decryption takes place in an isolated module that is very difficult to access and thus isolated from any attempts from unauthorized persons wishing to access encryption keys in order to copy the files from the media or the device.

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