Network Element Authentication via Mobile Key Distribution
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Solution Overview
Problem
Existing network security systems face challenges in efficiently and securely authenticating new devices and distributing encryption keys, particularly in expanding network coverage while ensuring unauthorized access is prevented.
Innovation Solution
A method that involves a mobile device connecting directly to a new switch to receive an identifier, which is then transmitted to an authentication server to determine authorization. If authorized, the server sends a private key via a public network for encrypting and decrypting discovery packets, allowing the new switch to digitally sign and communicate within the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional network authentication methods are used to verify new devices, then network security is maintained, but the authentication process is slow and inefficient
Solution Approach 1:
The system performs preliminary actions by pre-configuring authorized devices with unique identifiers and encryption keys before they connect to the network. When a device attempts to join, the authentication server already has the device's identifier in its database, allowing for immediate verification rather than requiring time-consuming registration processes. This preliminary preparation enables fast authentication while maintaining security through pre-established trust relationships.
Solution Approach 2:
The authentication server stores copies of authorized device identifiers and encryption keys in its database. When authentication is required, the server retrieves these pre-stored copies rather than verifying devices in real-time through complex protocols. This copying mechanism allows multiple devices to be authenticated quickly against the same trusted reference data, improving authentication speed while maintaining security through consistent verification criteria.
2Reliability
If encryption keys are distributed through the network to new devices, then secure communication is enabled, but key distribution may be intercepted or compromised
Solution Approach 1:
The system extracts the key distribution process from the public network infrastructure and performs it through a direct, dedicated connection between the authentication server and the new device. By taking the key exchange out of the general network traffic and isolating it in a separate, controlled communication channel, the system eliminates the risk of key interception through standard network attacks. The encryption keys never traverse the public network, removing the vulnerability to network-based eavesdropping and man-in-the-middle attacks.
Solution Approach 2:
The authentication server acts as a trusted intermediary that facilitates secure key distribution through a dedicated connection. Rather than allowing devices to exchange keys directly through the public network where interception is possible, the intermediary server mediates the entire process by generating keys and delivering them through a secure, isolated channel. This intermediary mechanism ensures that even though keys are distributed, they do so through a controlled process that prevents external interception.
3Adaptability or versatility
If network coverage is expanded by adding new devices, then connectivity is improved, but security risks increase with more potential unauthorized access points
Solution Approach 1:
The system enables self-service authentication where new devices automatically perform security verification by presenting their unique identifiers to the authentication server. The device itself initiates the authentication process and receives its encryption keys without requiring manual security configuration or administrator intervention. This self-service mechanism allows rapid network expansion as devices can join autonomously, while security is maintained through automatic verification against the server's authorized device database.
Solution Approach 2:
The authentication server provides immediate feedback to new devices regarding their authentication status. When a device connects, it automatically queries the server with its identifier and receives instant confirmation of authorization along with its encryption keys. This real-time feedback loop ensures that only authorized devices can join the network, as unauthorized devices will not receive valid authentication responses. The feedback mechanism enables fast expansion while preventing unauthorized access through immediate verification.
Data Source
AI summary
In an embodiment, a method enables authentication of devices connected to a network. The method also enables the devices to digitally sign communication on the network with private keys. When a new device is added to the network, a mobile device may be connected to the new device. The mobile device receives identification from the new device and sends the identification to an authorization server, over a public network. The mobile device also sends a request for a private key to the authorization server. The authorization server contains an inventory of the devices authorized to communicate over the network. If the identification of the new device exists in the inventory, the authorization server sends a private key to the mobile device, over the public network. The mobile device forwards the private key to the new device.