IP Broadcasting Key Decryption via Layered Protocol Stack
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Digital broadcasting employing an IP transferring method lacks a technical method for content protection, which is essential for advanced broadcasting services.
Innovation Solution
A receiving and transmitting apparatus that uses a protocol stack with decoders to manage keys for decoding broadcasting services, where a first decoder decodes a second key from a control signal at a higher layer, enabling content protection through Entitlement Management Messages (EMM) and Entitlement Control Messages (ECM) for secure broadcasting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If IP transferring method is adopted in digital broadcasting, then advanced broadcasting service can be provided, but content protection method is not established
Solution Approach 1:
The patent segments content protection into multiple layers by introducing a first decoder for lower layer key decryption and a second decoder for higher layer key decryption. This layered segmentation allows the system to maintain advanced broadcasting services while implementing robust content protection through hierarchical key management, where each layer has dedicated decryption capabilities.
Solution Approach 2:
The patent implements a nested key management structure where the first key (from lower layer) is used to decrypt the second key (from higher layer), which in turn is used to decrypt the actual content. This nested arrangement of decryption layers enables content protection to be integrated within the advanced IP-based broadcasting framework without compromising service functionality.
2Reliability
If multiple decoders are implemented for multi-layer key decoding, then content protection is enhanced, but device complexity increases
Solution Approach 1:
The patent designs the decoding system with multi-functional decoders that can handle both lower layer and higher layer key decryption operations. The first decoder and second decoder are configured to work together in a coordinated manner, where the first decoder processes lower layer keys and the second decoder processes higher layer keys, enabling enhanced content protection through a unified multi-functional architecture rather than separate isolated systems.
Data Source
AI summary
There is provided a receiving apparatus including circuitry that is configured to receive a broadcasting stream including digital data according to an IP (Internet Protocol) having a protocol stack of layers. The circuitry is configured to use a first key acquired based on a first control signal at a first layer to decode a second key included in a second control signal transferred at a second layer, and decrypt an encoded component that corresponds to a particular broadcasting service which is included in a stream obtained through the broadcasting stream, the second layer being a higher layer than the first layer in the protocol stack.