Implement User Verification and Bot Prevention System

[Luke-Larsen]

We need to implement a user verification and bot prevention system in our Node.js application. The system should include the following tasks:

User Verification:

• Implement a POW (Proof of Work) captcha for user verification.
• The captcha should be generated dynamically and presented to the user upon registration or login if the user's IP address or browser signature is suspicious.
• In case of a wrong captcha solution, the user should be given another attempt after a certain delay period (e.g., 30 seconds).

Bot Prevention:

• Implement a bot detection and flagging system.

  The system should monitor user behavior and flag suspicious activities, such as:

• like rapid registration attempts,

• login attempts from different IP addresses/tor addresses,

• and unnatural click or navigation patterns.

• If a user is flagged, the system should temporarily restrict their account and notify the admin for manual review.

• The system should maintain a history of flagged activities for each user, which can be used for manual review and further improvement of the bot detection algorithm.