Network Camera Certificate Binding for Device-Specific Authentication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for authenticating networked devices, such as cameras, are inadequate in verifying the authenticity of certificates, especially when devices lack domain names, leading to potential misuse of certificates across multiple devices and increased security risks.
Innovation Solution
A device authentication method involving the use of device binding information, including MAC addresses and component-specific details, is implemented to validate certificates through a management device, ensuring that the certificate is uniquely tied to the specific device and preventing unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If certificate pinning method is used to prevent certificate change, then security is improved, but it cannot be applied to devices without domain names and allows certificate sharing across multiple devices
Solution Approach 1:
The patent applies local quality by binding certificates to specific device identifiers (MAC addresses, serial numbers, model numbers) instead of using general domain names. This creates a localized, device-specific authentication mechanism that maintains security while adapting to devices without domain names. The certificate contains device-specific information that must match the connecting device, ensuring both reliability and adaptability.
Solution Approach 2:
The patent changes the authentication parameter from domain name to device-specific identifiers such as MAC address, serial number, and model number. This parameter change enables certificate pinning to work for any networked device regardless of whether it has a domain name, while maintaining the security benefits of certificate binding to specific devices.
2Reliability
If domain name is used for certificate verification, then certificate authenticity is improved, but certificate can be used by multiple devices with the same domain name
Solution Approach 1:
The patent replaces the global domain name identifier with local, device-specific identifiers embedded in the certificate such as MAC address, serial number, and model number. This ensures that each device has its own unique certificate binding, preventing certificate sharing while maintaining accurate device identification and authentication.
3Ease of operation
If simple certificate chain validation is performed, then authentication process is simplified, but it cannot confirm whether certificate was issued for the specific connecting device
Solution Approach 1:
The patent incorporates device-specific binding information directly into the certificate during the certificate issuance process. This preliminary action ensures that when the certificate is later validated, the device-specific confirmation is already embedded in the certificate itself, maintaining simplicity while ensuring reliability.
Solution Approach 2:
The patent implements a feedback mechanism where the management device verifies that the device information from the connecting device matches the device binding information embedded in the certificate. This feedback loop confirms device-specific authentication while keeping the overall process straightforward through automated verification.
Data Source
AI summary
A device authentication method includes: connecting to a device such as a camera through a network; receiving, from the device, a certificate of the device including device binding information about the device; sending, to the device, a device management message for administration level authentication; receiving, from the device, device information about the device in response to the administration level authentication being successful; determining whether the certificate is valid based on the device binding information and the device information; and establishing a protected communication session with the device in response to the certificate being determined to be valid.