Hardware Protection Module for Secure Media Playback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing digital rights management (DRM) technologies for multimedia content are vulnerable to reverse-engineering and unauthorized access due to the open nature of personal computers, making it challenging to protect encrypted media content from piracy.
Innovation Solution
A system and method for secure playback of multimedia content using a hardware protection module that receives media content and DRM information, partitions the content to forward only necessary data to the media player for decoding, while keeping sensitive video data in a secure environment within the hardware protection module for decryption and playback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If software-based DRM technologies are used to control access to encrypted content, then access control and encryption functionality is provided, but the software can be accessed and reverse-engineered, compromising security
Solution Approach 1:
The patent replaces software-based DRM mechanisms with a hardware-based protection module. The hardware module performs encryption and decryption operations using dedicated hardware circuits, making the DRM system immune to software reverse-engineering attacks. The hardware module is inaccessible to software applications, eliminating the vulnerability of software-based DRM to reverse-engineering while maintaining secure access control functionality.
2Ease of operation
If personal computers operate in an open environment to facilitate software execution, then ease of operation and software compatibility is improved, but multimedia content becomes vulnerable to memory analysis and key extraction
Solution Approach 1:
The patent introduces a hardware protection module as an intermediary between the open software environment and the encrypted content. This hardware module acts as a secure enclave that receives encryption keys and content from the software layer, performs protected decryption operations, and outputs decrypted content. The hardware module isolates sensitive cryptographic operations from the open memory space, preventing software-based analysis and key extraction while maintaining software compatibility.
Solution Approach 2:
The patent substitutes the software-based content protection mechanism with a hardware-based system. The hardware protection module uses dedicated cryptographic circuits and memory-protected regions to perform encryption and decryption operations, eliminating the vulnerability of software-based approaches to memory analysis. This hardware substitution maintains ease of operation through software interfaces while providing robust content protection.
3Ease of operation
If encryption keys are stored in memory for software-based DRM, then decryption functionality is enabled, but the keys can be dumped from memory to gain access to protected content
Solution Approach 1:
The patent replaces software-based key storage with hardware-based key management. The hardware protection module uses dedicated cryptographic memory regions and hardware security features to store and process encryption keys, making the keys inaccessible to software applications. The hardware module performs decryption operations by receiving encrypted content, accessing keys securely from hardware memory, and outputting decrypted content, eliminating the vulnerability of software-based key storage to memory dumping attacks.
Data Source
AI summary
Systems and methods for performing secure playback of media content are described. One embodiment, among others, is a method for performing secure playback of video in a hardware protection module. The method comprises receiving media content from a media player comprising video data, audio data, and navigation data. The method further comprises receiving digital rights management (DRM) information relating to the media content, removing a portion of the video data from the media content, forwarding the audio data, navigation data, and a remaining portion of the video data to the media player for decoding, and decoding, in the hardware protection module, the portion of the video data.