Secure Media Content Delivery with Revocable Access Control
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Solution Overview
Problem
Current methods for securing pre-release media content, such as screener discs, are either costly, inconvenient, or compromise audiovisual quality, failing to effectively prevent unauthorized access and distribution while ensuring high-quality playback.
Innovation Solution
A secure content delivery system that uses a combination of encryption, authentication servers, and watermarks to control access, allowing secure distribution of protected audiovisual content through standard hardware, with revocable authorization codes and imperceptible watermarks for forensic tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If unique watermarks are applied to each screener disc for security tracking, then forensic tracking capability is improved, but manufacturing cost increases prohibitively
Solution Approach 1:
The patent uses a single master disc that can be copied multiple times to create screener discs. The watermarking is applied digitally through software rather than physically during manufacturing, allowing unlimited copies from one master without additional manufacturing cost.
Solution Approach 2:
The patent replaces physical manufacturing processes with digital methods. Instead of applying unique physical watermarks during disc replication, the system uses digital watermarking software that can embed tracking information into copied discs without requiring specialized manufacturing equipment or processes.
2Reliability
If proprietary DRM playback equipment is used to prevent leaks, then security against unauthorized access is improved, but device compatibility and ease of operation deteriorates
Solution Approach 1:
The patent makes the screener discs compatible with standard, off-the-shelf DVD players and media playback devices. The security is implemented through software-based authorization codes that work with any device capable of reading the disc format, eliminating the need for proprietary hardware.
Solution Approach 2:
The patent introduces an intermediary authorization code system that mediates between the secure content and standard playback devices. The authorization code acts as a key that enables standard devices to play protected content without requiring specialized hardware modifications.
3Reliability
If secure online delivery systems are used for content distribution, then access control is improved, but audiovisual quality and integration with home theatre systems deteriorates
Solution Approach 1:
The patent pre-authorsizes the screener discs with authorization codes before distribution. This preliminary security measure is embedded in the disc itself, allowing access control to be enforced at the playback device level without requiring continuous online verification or specialized delivery infrastructure.
Data Source
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Figure 3a~3b
AI summary
There is provided a method for use by a media player to provide access to a media content. The method comprises receiving a request from a user for playing the media content, prompting a user for an authorization code, receiving the authorization code from the user, transmitting the authorization code to an authentication server over a network, receiving a valid authentication message from the authentication server over the network if the authorization code is confirmed to be valid, transmitting the valid authentication message to a content server over the network, retrieving the media content from the content server over the network, wherein the media content incorporates an identification information associating the media content with the user.