5G LAN Security Platform for API-Based Policy Enforcement

The patent introduces a Security Edge Protection Proxy (SEPP) as an intermediary component between 5G networks. The SEPP acts as a mediator that handles security functions including threat identification, application identification, URL filtering, and security policy enforcement. This intermediary approach allows the firewall functionality to be distributed and managed at the network edge rather than requiring complex local firewalls at every device, thereby improving network security while managing system complexity through centralized security management.

The patent implements preliminary action by pre-configuring security policies and rules in the SEPP before actual network traffic needs to be filtered. The system pre-establishes security contexts, application identification rules, and URL filtering policies. When network traffic arrives, the SEPP can quickly match traffic against pre-configured rules rather than analyzing everything from scratch, significantly reducing processing time while maintaining effective context-based security enforcement.

The patent applies segmentation by dividing the security processing functions into distinct modular components within the SEPP architecture. Different security functions (threat identification, application identification, URL filtering, intrusion prevention) are segmented into separate processing modules. Each module handles specific aspects of security analysis independently, allowing comprehensive security coverage while managing complexity through modular design. This segmentation enables the system to process different types of network traffic through appropriate specialized modules rather than requiring a single monolithic complex processor.