DID - Decentralized Identity Management

Device authentication and management are critical challenges in IoT security. Traditional IoT devices rely on centralized authentication systems such as cloud servers or gateway controllers, leading to risks such as single points of failure, identity spoofing, and data tampering.

AIoTChain introduces Decentralized Identity (DID) to assign IoT devices a unique, encrypted, and tamper-proof identity, allowing them to independently and securely interact without relying on third-party verification authorities.

Technical Architecture:

• Blockchain-based Public Key Identity (PKI Mechanism)

  • Each IoT device is assigned a unique cryptographic identity, registered on the blockchain to prevent spoofing.

  • Asymmetric encryption (public/private key pairs) ensures secure authentication across IoT networks.

• Decentralized Identity Authentication (DID)

  • Devices use blockchain-stored credentials to self-authenticate without a centralized server.

  • Smart contracts can automatically assign or revoke device permissions, enhancing flexibility and security.

Advantages:

• No centralized authentication server, eliminating single points of failure and improving attack resistance.

• Immutable identity records stored on the blockchain ensure device credibility.

• Device-to-device authentication, enabling direct and trusted data exchange without third-party verification.

Use Cases:

• Smart Homes: DID authentication for smart locks and security cameras to prevent hacking.

• Industrial IoT (IIoT): Secure authentication between production devices.

• Smart Transportation (V2X): Vehicles authenticate via DID to prevent identity spoofing attacks.