Fraud Prevention Server for Man-in-the-Middle Phishing Detection
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Solution Overview
Problem
Current methods fail to effectively prevent man-in-the-middle phishing attacks, particularly dynamic proxy attacks, where attackers hijack sessions or inject commands, making it difficult to distinguish between legitimate and fraudulent connections.
Innovation Solution
Implementing a fraud prevention server that uses device-specific information, encrypted with a session key, and appends a timestamp and IP address, which is then encrypted and sent back to the client device, allowing the network service server to verify the authenticity of the connection by comparing timestamps and IP addresses, thereby preventing unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If one-time passwords are used to prevent phishing attacks, then login security is improved, but the method fails against dynamic proxy attacks where information is passed through a server in the middle
Solution Approach 1:
The patent introduces a fraud prevention server as an intermediary between the client device and the network service server. This mediator verifies device-specific information and appends authentication data (timestamp, IP address) to communications, preventing man-in-the-middle attacks by ensuring the legitimacy of each communication party without compromising login security or adaptability to dynamic proxy attacks
2Difficulty of detecting and measuring
If device-specific information is encrypted and verified by a fraud prevention server, then detection of man-in-the-middle attacks is improved, but system complexity increases
Solution Approach 1:
The fraud prevention server acts as a specialized intermediary that handles the complexity of device-specific information verification, encryption, and authentication data appending. This concentrates the computational complexity in a dedicated component rather than distributing it across all system elements, making the overall system more manageable while improving attack detection capabilities
Solution Approach 2:
The system performs preliminary verification of device-specific information and appends authentication data (timestamp, IP address) before the actual login transaction occurs. This advance preparation enables efficient detection of man-in-the-middle attacks during the login process without adding significant complexity to the core authentication mechanism
3Reliability
If the fraud prevention server appends timestamp and IP address to verify connection authenticity, then prevention of unauthorized access is improved, but processing time increases
Solution Approach 1:
The fraud prevention server appends the timestamp to the device-specific information in advance, before the login transaction is completed. This preliminary action enables the network service server to quickly verify the authenticity of the connection by simply comparing the appended timestamp and IP address against current values, providing strong prevention of unauthorized access with minimal processing time during the actual login
Data Source
AI summary
Embodiments of the present invention provide methods, servers and articles of manufacture that detect and prevent man-in-the-middle phishing attacks. This includes receiving device-specific information from a client device at a fraud prevention server, appending at least one of an internet protocol (IP) address and/or a timestamp to the device-specific information, and forwarding the appended device-specific information back to the client device for providing to an network service server for use by the network service server to facilitate recognition of the client device via at least one of the IP address and/or the timestamp.