Client-Side Phishing Countermeasure via Local Verification File
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Solution Overview
Problem
Phishing attacks pose a significant threat to online security, as users often unknowingly provide credentials to fraudulent websites that mimic legitimate ones, leading to unauthorized access and potential financial losses.
Innovation Solution
Implementing a phishing countermeasure system that generates and stores a verification file on the client device, which is used to authenticate the legitimacy of online services by restricting access to only authorized resources, thereby preventing unauthorized access and reducing the risk of phishing attacks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a verification file is transmitted between server and client to authenticate legitimacy, then authentication reliability is improved, but security is worsened because the verification file could be intercepted by attackers
Solution Approach 1:
The verification file is extracted from the transmission channel and stored locally on the client device. The client browser retrieves the verification file from its own local storage rather than receiving it through network communication, thereby eliminating the interception vulnerability while maintaining authentication functionality.
Solution Approach 2:
The verification file is generated and stored on the client device in advance before any phishing detection is needed. When a user visits a website, the verification file is already available locally, allowing immediate authentication without requiring real-time transmission, thus preventing attacker interception.
2Object-affected harmful factors
If the verification file is stored on the client device, then security against interception is improved, but device complexity increases due to local storage requirements
Solution Approach 1:
The client device's existing local storage capacity is utilized for storing the verification file, rather than requiring a separate dedicated storage system. This approach leverages the universal storage functionality already present in browsers and devices, avoiding additional complexity while achieving secure local storage.
3Measurement precision
If users must manually verify verification files, then authentication precision is improved, but ease of operation deteriorates due to additional user steps
Solution Approach 1:
The system automatically retrieves and displays the verification file to the user without requiring manual intervention to obtain or verify it. The browser automatically handles the retrieval process from local storage and presents the verification information, making the authentication process transparent and simple for users while maintaining high precision.
Data Source
AI summary
A system and method for authenticating a resource such as a website or webpage is provided. In response to a script provided with a resource, a verification file is initially generated and stored at a client device. The verification file may be selected or generated with user input. On a subsequent occasion when a resource is accessed by the client device, a script is executed to attempt to retrieve the verification file and display the file at the client device. If the verification file is successfully retrieved and displayed and recognized as the correct verification file, the resource is authenticated.