TCP Authentication via EAP Encapsulation in Handshake
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Solution Overview
Problem
Traditional authentication methods in TCP/IP protocols are insecure as they establish a connection before authentication, allowing potential exploitation and require bridging between application and AAA protocols, which can be weak points.
Innovation Solution
Integrating EAP authentication mechanisms into the initiation phase of the TCP/IP protocol by using unused flags or option values in the segment header to encapsulate authentication sessions within the three-way handshake, ensuring authentication occurs before establishing a TCP connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional TCP/IP connection establishment is used before authentication, then connection speed is improved, but security is worsened because resources are allocated before verification
Solution Approach 1:
The patent applies preliminary action by performing authentication during the TCP three-way handshake process itself, before the connection is fully established and resources are allocated. The EAP authentication messages are encapsulated within the TCP segment headers, allowing verification to occur in advance of resource commitment, thus resolving the contradiction between speed and security.
2Reliability
If EAP authentication is integrated into TCP handshake, then authentication security is improved, but protocol complexity is worsened due to bridging requirements
Solution Approach 1:
The patent merges the EAP authentication protocol with the TCP/IP protocol by encapsulating EAP messages directly within TCP segment headers using unused flag fields. This integration eliminates the need for separate authentication channels and reduces complexity by combining two protocols into a unified communication framework, while maintaining authentication security.
Solution Approach 2:
The patent makes the TCP protocol multi-functional by enabling it to simultaneously perform connection establishment and authentication functions. The TCP header is extended to carry EAP authentication data, allowing a single protocol to fulfill multiple roles that traditionally required separate mechanisms, thereby reducing overall system complexity.
3Ease of operation
If authentication occurs after connection establishment, then ease of operation is improved, but vulnerability to exploitation is worsened
Solution Approach 1:
The patent performs authentication as a preliminary action during the TCP three-way handshake before the connection is fully established. By embedding EAP authentication messages within the handshake segments, the system verifies user credentials before allocating resources or establishing full connectivity, thereby preventing exploitation while maintaining operational simplicity through automatic integration.
Data Source
AI summary
An embodiment of the invention incorporates, or encapsulates, authentication mechanisms into an initiation phase of a transmission protocol session. In a preferred embodiment, Extensible Authentication Protocol (EAP) authentication steps are included in the three-way handshake of a request to establish a Transmission Control Protocol/Internet Protocol TCP/IP) session. An EAP authentication session request can be designated within the standard Transmission Control Protocol (TCP) segment by using unused flags in the segment header. Another way to designate the request is to include a predefined option value in the header.