Edge Network Security via Packet Transformation

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Solution Overview

Problem

Current edge network security mechanisms, including IDS, face inefficiencies in detecting unknown attacks due to rapidly inflating signature rules and misjudging legal actions as abnormal, necessitating improved detection and defense systems.

Innovation Solution

A system comprising an OpenFlow switch, network controller, and detecting and defending system that transforms and labels packet information, utilizing a deep learning module and signature detection to generate defending determinations, distinguishing between normal and abnormal packets to reduce malicious attack impacts.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If signature-based intrusion detection is used to detect known attacks with high accuracy, then detection precision is improved, but the system becomes unable to detect unknown attacks and detection efficiency decreases due to rapidly inflating signature rules

Engineering Contradiction:
Improvedetection precisionVSAvoidability to detect unknown attacks
Core Design Contradiction:
Measurement precisionVSAdaptability or versatility

Solution Approach 1:

The patent combines signature-based detection and anomaly-based detection into a unified intrusion detection system. The signature module handles known attacks with high precision, while the anomaly module detects unknown attacks by comparing behavior against established norms. This merging allows the system to maintain high detection precision for known threats while simultaneously gaining adaptability to detect novel, unknown attacks that deviate from normal behavior patterns.

Inventive Principle:
Principle #5Merging (Combining)

2Adaptability or versatility

If anomaly-based intrusion detection is used to detect unknown attacks, then adaptability is improved, but false positive rate increases due to misjudging legal actions as abnormal

Engineering Contradiction:
Improveability to detect unknown attacksVSAvoidfalse positive rate
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The patent introduces a behavior baseline as an intermediary reference for anomaly detection. Instead of directly comparing suspicious activities against rigid rules, the system establishes normal behavior patterns through machine learning and uses this baseline as a mediator to evaluate deviations. This intermediary layer reduces false positives by providing a more nuanced understanding of what constitutes abnormal behavior, allowing legitimate variations in system behavior to be distinguished from actual threats.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Reliability

If traditional network security mechanisms are used to protect edge network, then basic security coverage is provided, but detection efficiency decreases and calculation demands increase due to multi-application complexity

Engineering Contradiction:
Improvesecurity coverageVSAvoiddetection efficiency
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The patent replaces traditional mechanical intrusion detection mechanisms with machine learning-based automated analysis. Instead of relying on manually configured signature rules and static security policies, the system employs machine learning algorithms that automatically adapt to new threats and patterns. This substitution maintains comprehensive security coverage while significantly improving detection efficiency by automating the analysis of complex multi-application traffic and reducing the computational burden of manual rule management.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentEP3672184B1System and detecting and defending method for edge network
Publication Date: 2021.01.20 NAT CHUNG SHAN INST SCI & TECH
  • EP3672184B1 patent drawingFigure 1
  • EP3672184B1 patent drawingFigure 2
  • EP3672184B1 patent drawingFigure 3

AI summary

A computer system (10) includes an openflow switch (102), configured to receive a plurality of packets; a network controller (104), coupled to the openflow switch (102) and configured to determine a route of each of the plurality of packets; and a detecting and defending system (106), configured to perform transformation of information formats of the plurality of packets, retrieve and label the plurality of packets to determine whether the plurality of packets are abnormal or not and generate a defending determination.