Remote Access Authentication for Digital AV Content Transmission
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Solution Overview
Problem
Conventional copyright protection methods for digital AV contents transmitted over networks do not effectively limit access to authorized users accessing from remote locations, particularly for portable devices used outside the home environment.
Innovation Solution
Implementing an authentication process that verifies the legitimacy of remote access requests for digital AV equipment, using a shared authentication key to ensure that only authorized devices can access and decrypt protected content, thereby preventing unauthorized copying or viewing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional copy protection methods (DTCP, DTCP-IP) are used to encrypt content during transmission, then copyright protection is improved, but the ability to access content remotely from authorized devices is restricted
Solution Approach 1:
The authentication process is segmented into two distinct phases: initial authentication performed within the home network environment, and subsequent remote authentication performed when accessing content remotely. This segmentation allows the system to maintain strong copyright protection during initial setup while enabling convenient remote access for authorized devices.
Solution Approach 2:
The system performs preliminary authentication actions within the home network before remote access is needed. During this initial authentication, authorization information is established and stored, which is then reused during remote access. This preliminary action eliminates the need for complex real-time verification during remote access, thereby maintaining security while enabling versatility.
2Reliability
If authentication is performed for every remote access request, then security is improved, but user convenience and access speed deteriorate
Solution Approach 1:
Authentication is performed in advance when the portable device is initially connected to the home network equipment. The authorization information obtained during this preliminary authentication is stored and reused for subsequent remote access requests, eliminating the need for repeated authentication and significantly improving user convenience while maintaining security.
Solution Approach 2:
The system copies authorization information obtained during initial authentication and uses this copied information for subsequent remote access verification. Instead of performing full authentication repeatedly, the system verifies against the copied authorization data, which maintains security while dramatically reducing access time and improving ease of operation.
3Adaptability or versatility
If content is transmitted without encryption to enable remote access, then user convenience is improved, but copyright protection deteriorates
Solution Approach 1:
The system introduces an intermediary authentication mechanism that mediates between content transmission and copyright protection. During remote access, the portable device and home network equipment perform authentication through an intermediary verification process using pre-established authorization information, allowing encrypted content to be transmitted securely to authorized devices without compromising copyright protection.
Data Source
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AI summary
A content reception equipment for accessing an in-home content transmission equipment from a remote place executes a first authentication process with the content transmission equipment in advance, executes the remote access information sharing process required for access from a remote place, and causes the information on the content reception equipment and the remote access information to be registered in an equipment information table of the content transmission equipment. In the case where the in-home content transmission equipment is accessed by the content reception equipment brought out of home, the content transmission equipment transmits the content to the content reception equipment only in the case where the information on the content reception equipment is registered in the device information table of the content transmission equipment and the second authentication process using the remote access information is successfully executed between the content transmission equipment and the content reception equipment.