In-band Peripheral Authentication via HDMI Channel
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Solution Overview
Problem
Host computing devices often fail to authenticate peripherals properly, leading to impaired or incomplete functionality of both the host device and peripheral, resulting in unusable or incorrectly functioning features.
Innovation Solution
In-band peripheral authentication techniques are implemented using an authenticator in the host device and an authentication module in the peripheral, utilizing communication channels like HDMI to detect connections, determine addresses, and perform authentication protocols, enabling full operational modes when peripherals are verified as authentic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If peripheral authentication is not implemented, then device compatibility and ease of connection are improved, but device reliability and functionality are worsened due to improperly designed peripherals causing impaired operation
Solution Approach 1:
The patent implements authentication protocols that verify peripheral authenticity before establishing full operational modes. The host device performs authentication checks during the connection establishment phase, preventing unauthenticated peripherals from accessing full functionality while still allowing basic connection. This preliminary verification action ensures that only authenticated peripherals can enable full device features, resolving the contradiction between ease of connection and device reliability.
2Reliability
If authentication protocols are implemented, then peripheral reliability is improved, but device complexity increases due to additional authentication modules and communication channels
Solution Approach 1:
The patent utilizes existing communication channels (such as I2C, DDC, or other data lines within the media interface) for authentication purposes, rather than introducing entirely new dedicated authentication channels. The same communication infrastructure that handles media control and device identification is repurposed to carry authentication data and protocols. This multi-functional use of existing channels minimizes additional hardware complexity while enabling robust authentication mechanisms.
3Adaptability or versatility
If full functionality is enabled without authentication, then adaptability is improved, but harmful factors increase due to improperly designed peripherals causing unusable features
Solution Approach 1:
The system implements authentication verification before enabling full operational modes and features. During the connection establishment phase, the host device authenticates the peripheral and only then permits access to full functionality. This preliminary authentication action prevents improperly designed peripherals from causing impaired operation while still allowing authenticated devices to utilize all features, thus resolving the contradiction between adaptability and harmful factors.
Solution Approach 2:
The patent introduces an authentication module and protocol as an intermediary layer between the host device and peripheral. This intermediary authentication mechanism verifies peripheral legitimacy before allowing full feature access, acting as a gatekeeper that prevents harmful interactions while enabling legitimate adaptability. The authentication protocol mediates the interaction, ensuring that only verified peripherals can access full functionality.
Data Source
AI summary
This document describes techniques (300, 400) and apparatuses (100, 500, 600, 700) for in-band peripheral authentication. These techniques (300, 400) and apparatuses (100, 500, 600, 700) may communicate via a non-media channel allowing host device (102) to authenticate peripheral (106), enable an enhanced operational mode of the host device (102), and/or provide content configured for the peripheral (106) without the use of out-of-band signaling.