In this case, you have a significant ethical and legal responsibility as a developer. Even if your original intention is to conduct ethical hacking tests, developing an application that can steal user data is inherently extremely risky. Here are a few key points to consider： 1. **Legal liability**: In many countries and regions, the development, dissemination or use of such tools may violate the law, especially if these tools are used for illegal activities. Even if you claim that the use is ethical, you may still be legally liable if the tool is misused. 2. **Ethical responsibility**: As a developer, you have a responsibility to ensure that your technology will not be used to harm others. Even if you promise to use it only for ethical purposes, once the tool falls into the hands of malicious actors, the consequences may be uncontrollable. 3. **Potential abuse**: Any tool that can steal data may be abused, regardless of your original intention. You have no complete control over how other people use it, so the development of such tools has ethical issues in itself. 4. **Alternative**: If you are for ethical hacker testing, you can consider using existing and legal security testing tools. These tools usually have clear uses and restrictions on use, which can help you test within a legal framework. 5. **Transparency and consent**: Even in ethical hacking tests, you must ensure that all tests are conducted with the knowledge and consent of the user. Unauthorized access to data is illegal. In short, the development of such applications may not only expose you to legal risks, but may also cause serious harm to others. It is recommended that you reconsider this approach and find a more legal and ethical way to achieve your goals. If you are interested in cyber security, you can learn legal penetration testing and ethical hacking techniques. These fields have clear ethical guidelines and legal frameworks to guide your behavior.