Secure Accessory Connections via Dynamic Certificate Ordering
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Solution Overview
Problem
Existing authentication methods for computing devices and accessory devices can reveal sensitive information, potentially leading to device and user tracking, and may not be suitable for devices with limited capabilities.
Innovation Solution
An authentication exchange method that considers the sensitivity of authentication information, allowing devices to reveal their information in an ordered manner based on sensitivity, with devices able to change their authentication information prioritizing first, and offline devices with immutable information prioritizing last.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional authentication methods are used to ensure security, then device authentication is improved, but privacy is worsened due to revelation of sensitive information enabling device and user tracking
Solution Approach 1:
The patent applies dynamics by making the authentication information order changeable and adaptable. Devices can dynamically adjust the order in which they reveal authentication information based on sensitivity analysis, rather than following a fixed sequence. This allows the system to adapt to different device capabilities and sensitivity levels while maintaining security and privacy.
Solution Approach 2:
The patent changes the parameter of authentication information revelation order based on sensitivity analysis. By analyzing the sensitivity of authentication information and adjusting the revelation order accordingly, the system transforms a static authentication process into a dynamic one that adapts to different scenarios, thereby reducing privacy risks while maintaining authentication security.
2Ease of operation
If authentication information is revealed in a fixed order, then the authentication process is simple, but it cannot accommodate devices with limited capabilities or different sensitivity levels
Solution Approach 1:
The patent makes the authentication information order dynamic and adaptable rather than fixed. The system automatically adjusts the revelation order based on device capabilities and sensitivity analysis, enabling the same authentication process to accommodate diverse device types and capabilities without requiring complex manual configuration.
Solution Approach 2:
The system incorporates feedback mechanisms where devices provide information about their capabilities and sensitivity levels, which then feeds back into the authentication process to determine the appropriate revelation order. This feedback loop enables the system to adapt to different device capabilities while maintaining a relatively simple authentication flow.
3Adaptability or versatility
If devices with immutable authentication information participate in the authentication exchange, then all devices can be included, but they must reveal their information last which may limit their participation effectiveness
Solution Approach 1:
The patent applies dynamics by allowing the authentication information order to be dynamically adjusted based on device characteristics. Devices with immutable authentication information are automatically positioned later in the revelation sequence, while devices that can change their information are positioned earlier. This dynamic ordering ensures that all device types can participate effectively without compromising authentication reliability.
Solution Approach 2:
The system changes the parameter of authentication information revelation order based on device capabilities. By analyzing whether a device has immutable or changeable authentication information, the system adjusts the revelation order accordingly, ensuring that devices with immutable information participate effectively without limiting their inclusion in the authentication exchange.
Data Source
AI summary
Techniques are disclosed relating to securely authenticating communicating devices. In various embodiments, a computing device receives, via a network connection with a network, a first certificate for a first public key pair of the computing device. The computing device provides the first certificate to an offline accessory device and receives a second certificate for a second public key pair maintained by the offline accessory device. The computing device performs a verification of the second certificate and, responsive to the verification being successful, interacts with the offline accessory device. In some embodiments, prior to providing the first certificate, the computing device determines an ordering in which the first and second certificates are to be exchanged by the first computing device and the offline accessory device, and the first certificate is provided to the offline accessory device in accordance with the determined ordering.