Offline Network Device Provisioning via Pre-Shared Key Validation
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Solution Overview
Problem
Existing network device provisioning methods in offline scenarios lack effective trust validation, leading to potential security breaches and inefficiencies, as non-authorized devices can impersonate authorized ones, especially when there is no access to validated lists of network devices.
Innovation Solution
A two-stage validation process involving the use of a pre-shared key (PSK) on the DHCP server and a hash file containing unique identifiers of authorized devices, where the network device verifies against these during onboarding, ensuring only trusted devices join the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual validation processes are used for network device provisioning in offline scenarios, then security can be maintained through human verification, but labor costs increase and errors may occur
Solution Approach 1:
The system enables automatic self-validation of network devices through cryptographic verification. Devices present cryptographic proofs (signatures, certificates) that are automatically verified by the provisioning system without human intervention, eliminating manual validation labor while maintaining security through cryptographic trust verification
Solution Approach 2:
Manual mechanical verification processes are replaced with automated cryptographic validation mechanisms. The system uses digital signatures, certificates, and hash verification to automatically authenticate devices, substituting human judgment with algorithmic security verification that is both faster and more reliable
2Productivity
If automated provisioning is implemented without validated device lists, then deployment speed increases, but security deteriorates as unauthorized devices can join
Solution Approach 1:
Cryptographic trust credentials (signing keys, certificates, hash values) are pre-configured in devices and the provisioning system before deployment. This preliminary setup enables immediate automated verification upon device connection, achieving both fast deployment and security without requiring post-deployment validation
Solution Approach 2:
Cryptographic certificates and digital signatures serve as intermediary trust mediators between devices and the provisioning system. These cryptographic artifacts enable the system to automatically verify device authenticity without needing a pre-existing validated device list, bridging the trust gap in offline automated provisioning
3Reliability
If cryptographic verification is implemented for device validation, then security is enhanced, but system complexity increases
Solution Approach 1:
A single unified cryptographic verification framework handles multiple validation requirements (device authentication, configuration integrity, trust verification) through consistent cryptographic operations. This universal approach consolidates what could be multiple separate validation systems into one coherent mechanism, managing complexity through standardization
Solution Approach 2:
The system uses cryptographic hash copies and digital signatures that can be independently verified without requiring access to the original device state or secret keys. These cryptographic copies enable secure verification while keeping the actual sensitive materials (private keys, secret configurations) confined to secure elements, simplifying the overall trust architecture
Data Source
AI summary
Systems and methods are provided for new network device provisioning without Internet access. One method may include a method of network device provisioning without Internet access, the method including entering a pre-shared key (PSK) in a dynamic host configuration protocol (DHCP) message, obtaining the PSK from a set of DHCP message options by an onboarding network device requesting to join a private network, presenting the PSK, by the onboarding network device, to a network management system (NMS) of the private network, validating the PSK by the NMS, and updating an inventory list of the NMS to include the onboarding network device in the inventory list.