Authentication Symbol String Generation for Single-Device Content Restriction
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Solution Overview
Problem
Existing content or application providing systems fail to restrict usage to a single authorized terminal device, allowing unauthorized devices to impersonate the authorized device and access content or applications, leading to unauthorized use across multiple devices.
Innovation Solution
A system that includes a terminal device and an authentication system, where a unique terminal ID and authentication symbol string are used to authenticate and authorize access, with generation rules for creating new authentication symbols to prevent unauthorized use, ensuring content or applications are only accessible on a single authorized device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal ID authentication is used to control content access, then authorized terminals can access content, but unauthorized terminals can impersonate authorized terminals and access content on multiple devices
Solution Approach 1:
The patent segments the authentication mechanism into two independent components: terminal ID (identifying the device) and authentication symbol string (proving legitimacy). This segmentation allows the system to distinguish between authorized and unauthorized terminals even when terminal IDs are replicated, by requiring both components to match the specific authorized combination stored in the content protection device.
Solution Approach 2:
The authentication symbol string acts as an intermediary element between the terminal ID and the content access permission. Instead of directly linking terminal ID to access rights (which can be copied), the system uses the authentication symbol string as a mediator that must correspond to the specific terminal ID, creating a binding that prevents unauthorized access while allowing authorized use.
2Ease of manufacture
If simple terminal ID storage is used, then the system is easy to implement, but the system cannot prevent copying of content to unauthorized devices
Solution Approach 1:
The patent merges the terminal ID authentication function with the content protection function by integrating the authentication symbol string into the content protection device. This combination ensures that content can be protected reliably while maintaining ease of implementation, as the authentication mechanism is built into the existing content delivery infrastructure without requiring separate complex authentication hardware.
3Reliability
If authentication symbol string is generated and updated, then single-device usage restriction is achieved, but the system complexity increases
Solution Approach 1:
The authentication symbol string is generated and updated automatically by the content protection device without requiring manual intervention or complex user-side authentication hardware. The system performs self-service authentication by comparing the transmitted authentication symbol string with the stored one, achieving single-device usage restriction while minimizing added complexity through automated verification.
Data Source
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AI summary
To provide a system for providing content or an application capable of restricting a terminal device in which the content or the application is able to be used to a single terminal device among one authorized terminal device and one or more unauthorized terminal devices. According to a generation rule, a new authentication symbol string is generated based on at least a part of an authentication symbol string stored in a first authentication symbol string storage unit (100). In a case where the new authentication symbol string belongs to a type of an authentication symbol string that is able to be generated, according to the above mentioned generation rule, based on at least a part of an authentication symbol string stored in a second authentication symbol string storage unit (200) so as to be correlated to terminal identification information, use of content or an application in a terminal device (10) is permitted, and the authentication symbol string stored in the first authentication symbol string storage unit (100) and the authentication symbol string stored in the second authentication symbol string storage unit (200) so as to be correlated to the terminal identification information are updated to the above mentioned new authentication symbol string.