AI-Powered Phishing Email Detection System: Security Protection from Machine Learning to Generative AI

This article introduces the open-source project phishing-ai-detector, which builds an intelligent phishing email detection system by combining traditional machine learning and generative AI technologies, covering background, technical architecture, workflow, application value, and future outlook. The project is maintained by Eleia522000 and was released on GitHub on May 25, 2025 (link: https://github.com/Eleia522000/phishing-ai-detector).

In the digital age, phishing attacks are one of the most common and harmful threats to cybersecurity. Attackers disguise themselves as trusted entities to trick users into revealing sensitive information. Traditional rule-based or keyword filtering methods struggle to handle complex attacks, especially phishing content created by generative AI, where the naturalness of language and deception have significantly increased, making traditional methods insufficient.

The project's technical architecture includes four core components:

1. Data Preprocessing Module: Cleans data, handles missing values, standardizes text, and converts it into feature vectors;
2. Machine Learning Model: Serves as the basic detection layer, using historically labeled data to learn patterns of phishing content (such as vocabulary combinations, sentence structures, URL features, etc.);
3. Generative AI Integration: Captures complex language patterns and identifies carefully designed phishing content;
4. User Interface: Allows users to input suspicious content and returns real-time classification results and confidence scores.

The detection process follows a standard machine learning paradigm:

1. Collect and label a large number of phishing and normal email samples;
2. Preprocess and split into training and test sets;
3. Build and optimize the detection model using training data;
4. Evaluate the model's generalization ability with an independent test set;
5. Deploy the model to the interface to provide real-time detection services.

The project has significant practical application value:

• Enterprise Security Teams: Acts as an auxiliary detection layer for email gateways, intercepting new phishing attacks missed by traditional rules;
• Individual Users: A lightweight self-check tool to get AI opinions before clicking suspicious links;
• Open-Source Community: Provides an extensible basic framework, allowing researchers to integrate new algorithms or adapt to industry needs.

Current Limitations: Phishing attackers are constantly evolving, and the generative AI arms race requires the system to continuously update training data and model architecture. Future Outlook: Explore directions such as multi-language support, image-based phishing detection, and integrated linkage with other security systems.

phishing-ai-detector represents a typical application of AI in the field of cybersecurity: combining the stability of traditional machine learning with the semantic understanding ability of generative AI to build an intelligent protection system. For developers and researchers interested in AI security applications, it is an open-source project worth in-depth research and contribution.