Accessory Authentication via Remote Pairing Service
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Solution Overview
Problem
Existing counterfeit prevention schemes for computing device accessories are vulnerable to unauthorized use and counterfeiting, as security chips can be stolen or used to unlock value-add features without authorization, and rely on single keys that can compromise entire systems if compromised.
Innovation Solution
Implementing a system where security chips are activated at the factory, using a private/public key pair to limit activations, and employing mutual authentication between host devices and accessories via a remote pairing service to ensure authorized usage and prevent unauthorized unlocking of features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a security chip is used for counterfeit prevention, then device authentication is improved, but the system becomes vulnerable to stolen chips and unauthorized feature unlocking
Solution Approach 1:
The authentication system is segmented into multiple independent components: a security chip embedded in the accessory, a host device with authentication logic, and a remote pairing service. Each component performs a specific function, and together they form a distributed authentication system that is more resilient to compromise than a single centralized security mechanism.
Solution Approach 2:
A remote pairing service acts as an intermediary between the host device and accessory during the authentication process. This mediator verifies the authenticity of both parties and establishes secure pairing, preventing stolen security chips from being used for counterfeiting while enabling authorized feature access.
2Adaptability or versatility
If value-add features are enabled on expensive devices, then product differentiation is improved, but unauthorized feature unlocking on lower-cost models becomes possible
Solution Approach 1:
Different authentication credentials and feature sets are assigned to different device pairs based on their authorization level. The remote pairing service enables the host device to authenticate the accessory and unlock specific value-add features locally, while the security chip ensures that only authorized feature sets can be accessed on each device model.
3Device complexity
If single keys are used for security chip authentication, then system simplicity is improved, but ecosystem compromise occurs if the key is stolen
Solution Approach 1:
The authentication credentials are segmented into multiple components stored in different locations: a private key in the remote pairing service, a public key in the host device, and a security chip credential in the accessory. This segmentation ensures that compromise of one component does not lead to complete ecosystem compromise.
Data Source
AI summary
Various embodiments are disclosed that relate to security of a computer accessory device. For example, one non-limiting embodiment provides a host computing device configured to conduct an initial portion of a mutual authentication session with an accessory device, and send information regarding the host computing device and the accessory device to a remote pairing service via a computer network. The host computing device is further configured to, in response, receive a pairing certificate from the remote pairing service, the pairing certificate being encrypted via a private key of the remote pairing service, and complete the mutual authentication with the accessory device using the pairing certificate from the remote pairing service.