Encrypting Video Data via High-Speed Internal Channel
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Solution Overview
Problem
Consumer video processing devices are vulnerable to tampering due to insecure internal structures, allowing unauthorized changes in encryption levels, resulting in unencrypted or underencrypted video data transmission.
Innovation Solution
A video processing device design where encryption control data is transmitted over a high-speed internal data channel, separate from and more secure than slower side channels, ensuring that encryption levels are applied correctly and securely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If encryption control data is transmitted over a separate slower data channel, then the device complexity is reduced, but the security against tampering is worsened
Solution Approach 1:
The patent merges the transmission of encryption control data with video data by sending both over the same high-speed data channel. This combining of control data and video data transmission eliminates the need for a separate control channel, thereby maintaining device simplicity while achieving enhanced security through the use of the more secure high-speed channel for both data types.
2Ease of operation
If a separate data channel is used for encryption control data, then the ease of operation is improved, but the security is worsened
Solution Approach 1:
The patent combines encryption control data and video data transmission into a single high-speed data channel. This approach maintains operational simplicity by using one channel while achieving superior security, as the high-speed channel is more difficult to tamper with compared to slower alternative channels.
3Reliability
If encryption control data is transmitted over a high-speed data channel, then the security against tampering is improved, but the device complexity increases
Solution Approach 1:
The patent resolves the complexity issue by merging encryption control data transmission with video data transmission over the same high-speed channel. This eliminates the need for additional separate infrastructure, thereby achieving enhanced security without proportionally increasing device complexity.
4Device complexity
If a slower separate data channel is used for encryption control data, then the device complexity is reduced, but the loss of information is worsened due to potential tampering
Solution Approach 1:
The patent combines encryption control data and video data transmission over the same high-speed channel, ensuring that control data cannot be tampered with or lost. This merging approach maintains device simplicity while preventing information loss through the use of a more secure transmission channel.
Data Source
AI summary
In one aspect, a video processing device includes a processor and a transmitter, for example implemented as separate integrated circuits on a printed circuit board. Pins on the processor are coupled to pins on the transmitter via a data channel, for example conductive leads on the printed circuit board. Video data is transmitted from the processor to the transmitter via this data channel, which is high speed enough to accommodate video data. The transmitter also includes an encryption engine used to encrypt the video data. Encryption control data, which determines the encryption to be applied, is transmitted from the processor to the transmitter over the same data channel as the video data. This is more secure than transmitting the encryption control data over a slower separate data channel, because the high speed video channel is harder to tamper with.