IoT Composite Object Identity with Blockchain-Based EPID Authentication

The patent introduces blockchain as a decentralized intermediary ledger and EPID (Enhanced Privacy Identifiers) as cryptographic intermediaries that enable secure device identification and authentication without requiring centralized authorities. These intermediaries handle the complex trust management, allowing IoT devices to verify each other's identities through cryptographic proofs stored on the blockchain, thereby improving security while managing complexity through standardized protocols.

The system enables IoT devices to autonomously manage their own identities and authentication credentials through self-sovereign identity mechanisms. Each device generates and controls its own cryptographic key pairs and can prove its identity without external intervention, reducing the need for complex centralized management infrastructure while enhancing security and device autonomy.

The patent implements preliminary registration of device identities and attributes on the blockchain before devices join dynamic networks. This pre-established identity infrastructure ensures that when devices form composite objects ad-hoc, their identities are already verified and recorded, preventing information loss. The blockchain serves as a persistent memory that retains identity information even as network compositions change dynamically.

The system incorporates feedback mechanisms where devices continuously verify and update their identities and relationships on the blockchain. When composite objects form or dissolve, the blockchain ledger provides feedback by recording these state changes, ensuring that identity management information is preserved and synchronized across the decentralized network, preventing information loss through continuous verification loops.