IoT Device Pairing via Server-Mediated Cryptographic Keys

The patent segments the authentication process into multiple distinct stages: initial device pairing with cryptographic key exchange, separate user authentication, and specific operation authorization. This multi-layered segmentation ensures that each aspect (device trust, user identity, operation permission) is independently verified, resolving the contradiction by maintaining ease of use through automated processes while significantly improving security through comprehensive verification at each stage.

The patent implements preliminary pairing and cryptographic key exchange between devices before any remote operations can occur. This preliminary action establishes a secure cryptographic foundation in advance, so that subsequent operations can be securely authenticated without adding complexity to the actual operation process. The pairing resource is generated and stored beforehand, enabling both ease of operation and high security.

The patent introduces a server as an intermediary that manages the generation, distribution, and storage of cryptographic pairing resources. Rather than requiring each device to independently manage complex cryptographic key pairs, the server acts as a trusted mediator that handles the cryptographic infrastructure. This reduces device complexity while maintaining or improving security, as the server centralizes the management of pairing resources and can implement security policies across the entire system.

The patent creates cryptographic pairing resources as digital copies that can be securely stored and transmitted. Instead of requiring complex hardware security modules or physical security tokens, the system uses software-based cryptographic copies of keys and pairing information. These digital copies can be securely stored in device memory and used for authentication, significantly reducing hardware complexity while maintaining cryptographic security.

The patent performs device identifier collection, verification, and pairing resource generation as preliminary actions during an initial setup phase. Once the pairing is established and cryptographic resources are exchanged, subsequent remote operations can proceed with faster authentication using the pre-established cryptographic keys. This preliminary verification ensures high authorization accuracy for the initial pairing while minimizing time loss for actual operational commands.

The patent uses cryptographic copies of device identifiers and authentication tokens that can be quickly verified without requiring real-time server intervention for each operation. The server verifies device identifiers once during pairing and creates cryptographic tokens that prove authorization. These tokens can be validated locally or with minimal server communication, maintaining high authorization accuracy while significantly reducing the time required for subsequent operations compared to repeated full verification cycles.