Blockchain SDN Cloud Security Architecture

The patent segments the centralized security management into multiple distributed SDN controllers, each capable of independent security detection and packet verification. This eliminates the single point of failure while maintaining detection capabilities through distributed architecture.

The patent introduces blockchain as an intermediary layer between SDN controllers and the security management system. The blockchain ledger serves as a trusted mediator that verifies controller identities and maintains security policies, enabling decentralized security management without a single point of failure.

The patent implements a feedback mechanism where SDN controllers continuously verify each other's operations and security states through blockchain-based consensus. This creates a self-regulating system that maintains security trustworthiness while utilizing third-party networking services.

The blockchain platform acts as a trusted intermediary that enables secure interactions between cloud service providers and third-party networking services. It provides verifiable security policies and controller authentication without requiring direct trust in third-party providers.

The patent divides the centralized SDN controller into multiple distributed controllers that peer through blockchain. Each controller maintains independent security verification capabilities, preventing manipulation attacks while distributing management responsibilities across multiple nodes.

The patent changes the operational parameters of SDN controllers by implementing blockchain-based identity verification and cryptographic authentication. This transforms the controllers from potentially vulnerable centralized entities to secured distributed nodes with tamper-resistant identity management.