HDCP KSV Key Pairing for Secure Transmitter-Receiver Authentication

Solution Overview

Problem

There is a need for secure pairing mechanisms between transmitter and receiver devices to prevent unauthorized access and data theft, especially in multimedia systems where personal data is at risk due to device portability and potential theft.

Innovation Solution

The method involves storing program code on the transmitter device for performing a bootup sequence that includes scanning for connected receiver devices, determining if paired, obtaining and comparing KSV keys, and performing user authentication to encrypt keys or disable the receiver device if unauthorized, ensuring secure pairing and preventing unauthorized access.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If device portability is increased to enable broad applications and activities, then adaptability and versatility are improved, but security risk and vulnerability to unauthorized access increase

Engineering Contradiction:

Improvedevice portabilityVSAvoidsecurity risk

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary pairing authentication between transmitter and receiver devices before content transmission begins. The transmitter device stores receiver device data including KSV keys and verifies device identity in advance through authentication protocols, ensuring that only authorized devices can receive and display content. This preliminary security check prevents unauthorized access before it can occur.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces an intermediary authentication mechanism using HDCP KSV keys as a mediator between the transmitter and receiver devices. The KSV key acts as a cryptographic intermediary that verifies device identity and authorization status, enabling secure content transmission only between authenticated devices without requiring direct trust between the devices themselves.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If security measures are strengthened to prevent unauthorized access and data theft, then data protection is improved, but device complexity and pairing process complexity increase

Engineering Contradiction:

Improvedata protectionVSAvoidpairing process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The transmitter device automatically performs the pairing authentication process with connected receiver devices without requiring manual user intervention for each transmission session. The device stores receiver device data including KSV keys in memory and automatically verifies device identity and authorization status when a receiver is connected, enabling secure content transmission to begin immediately after physical connection.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system performs preliminary pairing authentication between transmitter and receiver devices before content transmission begins. The transmitter device stores receiver device data including KSV keys and verifies device identity in advance through authentication protocols, ensuring that only authorized devices can receive and display content. This preliminary security check prevents unauthorized access before it can occur.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If authentication protocols are implemented to verify device identity and authorization, then access security is improved, but processing time and bootup sequence duration increase

Engineering Contradiction:

Improveaccess securityVSAvoidbootup sequence duration

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The transmitter device automatically performs the pairing authentication process with connected receiver devices without requiring manual user intervention for each transmission session. The device stores receiver device data including KSV keys in memory and automatically verifies device identity and authorization status when a receiver is connected, enabling secure content transmission to begin immediately after physical connection.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system performs preliminary pairing authentication between transmitter and receiver devices before content transmission begins. The transmitter device stores receiver device data including KSV keys and verifies device identity in advance through authentication protocols, ensuring that only authorized devices can receive and display content. This preliminary security check prevents unauthorized access before it can occur.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12008090B2System and method for pairing transmitter and receiver devices using HDCP KSV keys

Publication Date: 2024.06.11 ARRIS ENTERPRISES LLC

AI summary

Exemplary embodiments of the present disclosure are directed to pairing HDCP-compatible transmitter and receiver devices. A transmitter device can scan one or more of its multimedia interfaces for a connected receiver device. When a connected receiver device is detected, the transmitter device determines whether the transmitter device is currently paired with the connected receiver device. If there is no current pairing, the transmitter device obtains at least a receiver KSV key from the receiver device and reads at least a transmitter KSV key from its memory. The pairing operation is either completed or terminated based on a user authentication process. If completed, the transmitter device encrypts at least the transmitter KSV key and the receiver KSV key. If terminated, the transmitter device disables the connected receiver device. Whether the pairing operation is terminated or completed, the transmitter device completes the bootup sequence.