Accessory Auto-Pairing Using Account-Based Cryptographic Keys

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Solution Overview

Problem

The existing pairing process for accessories with host devices, such as wireless headphones with mobile phones, is cumbersome and prone to failure, negatively impacting the user experience and security.

Innovation Solution

An accessory with a short-range wireless antenna, memory, and processors is configured to transmit an encrypted message using a public and private key associated with an account, allowing automatic connection to a host device without user input.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If manual pairing process is used to establish secure communication between host device and accessory, then security is improved, but ease of operation deteriorates

Engineering Contradiction:

ImprovesecurityVSAvoidease of operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The system performs preliminary actions by pre-establishing cryptographic key pairs and storing them in secure elements during manufacturing. The host device and accessory exchange cryptographic credentials automatically during the pairing process, eliminating the need for manual security configuration while maintaining secure communication channels.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The pairing process is designed to be self-service oriented, where the host device and accessory automatically perform cryptographic handshakes, validate each other's credentials, and establish secure connections without user intervention. The system handles security protocols autonomously through automated credential verification and connection establishment.

Inventive Principle:

Principle #25Self-service

2Reliability

If detailed manual pairing steps are required to ensure secure connection, then reliability is improved, but loss of time increases

Engineering Contradiction:

ImprovereliabilityVSAvoidloss of time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

Cryptographic key pairs are generated and stored in secure elements during manufacturing, and connection credentials are pre-configured in the system. This preliminary setup enables rapid automated pairing while maintaining security, eliminating time-consuming manual configuration steps.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces manual mechanical pairing operations (button presses, code entry, screen navigation) with automated electronic cryptographic protocols. The host device and accessory perform automated credential verification and connection establishment through wireless communication, dramatically reducing pairing time while maintaining reliability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If automated pairing is implemented to improve ease of operation, then ease of operation is improved, but device complexity increases

Engineering Contradiction:

Improveease of operationVSAvoiddevice complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent introduces cryptographic protocols and secure element modules as intermediaries between the host device and accessory. These intermediaries handle the complexity of automated authentication and key exchange, allowing the main system components to remain relatively simple while enabling sophisticated automated pairing functionality.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system implements self-service automated pairing where the host device and accessory autonomously perform cryptographic handshakes, credential validation, and connection establishment. The automated processes handle complex security protocols without requiring additional user interface elements or complex control logic in the main system architecture.

Inventive Principle:

Principle #25Self-service

4Productivity

If cryptographic key exchange is performed automatically to enable seamless pairing, then productivity is improved, but loss of time during initial setup increases

Engineering Contradiction:

ImproveproductivityVSAvoidloss of time during initial setup

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces manual pairing operations with automated electronic cryptographic protocols that execute rapidly through wireless communication. The automated credential verification and connection establishment processes complete in seconds, significantly improving productivity compared to manual methods despite the complexity of cryptographic operations.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentEP3959907B1Automatically paired devices

Publication Date: 2026.03.25 GOOGLE LLC

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AI summary

A system and method for automatically connecting an accessory with a host device are disclosed. The accessory may include a private key and a public key, wherein the public key is associated with an account. The same account may be associated with the host device. The accessory may transmit an encrypted message, including a key, to the host device, wherein the key may be the public key. Upon decryption and validation of the key, the accessory and host device may automatically connect via short- range wireless pairing.