IP Address Authentication via DHCP Watermarks
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Solution Overview
Problem
Current network security systems face challenges in identifying unauthorized use of IP addresses, particularly due to the dynamic nature of IP addresses in DHCP, which makes real-time monitoring and detection of malicious activities complex and inefficient.
Innovation Solution
The system authenticates IP addresses by sending a message to a routing device upon validation, uses watermarks in DHCP discover messages to verify legitimacy, and employs a network management system with machine learning to track and manage authenticated addresses, thereby preventing unauthorized use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If DHCP dynamic IP addresses are used to provide network connectivity, then ease of device connection and network adaptability is improved, but ability to track and monitor IP address usage deteriorates
Solution Approach 1:
The patent introduces an intermediary authentication mechanism between DHCP and routing decisions. The system inserts an authentication step that verifies device identity and authorization before allowing IP address assignment and network access. This intermediary layer resolves the contradiction by maintaining DHCP's adaptability while adding tracking capability through authentication records.
Solution Approach 2:
The system performs preliminary authentication actions before IP address assignment and network access is granted. By validating device identity and authorization status in advance, the system establishes a trackable authentication record before the dynamic IP addressing begins, enabling subsequent monitoring and tracking of the device's network activities.
2Reliability
If real-time monitoring of IP address usage is implemented to detect malicious activities, then network security is improved, but system complexity and data processing requirements deteriorate
Solution Approach 1:
The system performs preliminary authentication and authorization actions before network access is granted, creating a foundation for security monitoring. By establishing authenticated device records in advance, the system simplifies real-time monitoring by having pre-validated identity information available for comparison against suspicious activities.
Solution Approach 2:
The patent implements feedback mechanisms where authentication results and device identification information are fed back into the routing and monitoring systems. This feedback loop enables real-time security monitoring by continuously comparing current network activities against authenticated device profiles, allowing the system to detect deviations indicating malicious behavior.
3Reliability
If authentication processes are integrated with routing decisions, then unauthorized address use is prevented, but processing time and authentication overhead deteriorate
Solution Approach 1:
The system performs authentication actions preliminarily before routing decisions are made, establishing authenticated device records in advance. This preliminary authentication creates a lookup table or cache of authorized devices that can be quickly referenced during routing decisions, reducing real-time processing time while maintaining security.
Solution Approach 2:
The patent implements dynamic authentication mechanisms that can adapt processing depth and speed based on risk assessment. For low-risk authenticated devices, the system uses fast lookup protocols; for high-risk scenarios, more thorough authentication processes are applied. This dynamic approach optimizes the balance between security thoroughness and processing speed.
Data Source
AI summary
A request to authenticate is received (e.g., a request to login with a username/password). The request to authenticate comprises an address associated with the request to authenticate (e.g., an IP address). The request to authenticate is validated. In response to validating the request to authenticate, a message is sent to a routing device that identifies the address as authenticated for routing packets. In a second embodiment, a DHCP discover message is received. The DHCP discover message is a request to get an IP address. A determination is made to determine if the DHCP discover message comprises a watermark. In response to determining that the DHCP discover message comprises the watermark: a DHCP offer message is sent with an IP address and a third message is sent to a routing device that identifies the IP address as valid for routing packets.