Building my own reCAPTCHA alternative
2 min read
6 months ago
Published on Apr 23, 2024
This response is partially generated with the help of AI. It may contain inaccuracies.
Table of Contents
Building a Secure reCAPTCHA Alternative Tutorial
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Introduction to the Project:
- In this tutorial, we will be building a secure alternative to Google reCAPTCHA. The goal is to create a system that effectively prevents bots from interacting with a chatbot while minimizing the impact on legitimate users.
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Understanding the Problem with Google reCAPTCHA:
- Google reCAPTCHA is known to be resource-intensive, downloading large amounts of data (up to 1.8 megabytes) for each interaction.
- The speaker demonstrates how removing Google reCAPTCHA can save up to 93% of bandwidth by simply deleting it.
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Implementing Blowfish Hashing for Proof of Work:
- The alternative solution utilizes Blowfish hashing for proof of work, making it computationally intensive for bots to interact with the chatbot.
- Blowfish hashing ensures that creating the necessary hash takes a significant amount of CPU resources, making it impractical for malicious clients to generate multiple requests.
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Dynamic Key Generation and Time Stamp Management:
- The system dynamically generates public and private keys based on Unix timestamps, ensuring that the keys change regularly.
- A set timeout function updates the keys every 10 minutes, further enhancing security by rejecting keys that are too old.
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Testing the System:
- The speaker demonstrates how the system works by interacting with the chatbot and generating a new Blowfish hash for each interaction.
- The system effectively prevents bots from invoking the chatbot repeatedly by requiring frequent key updates.
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Benefits of the Alternative Solution:
- By implementing this alternative solution, the system can effectively deter bots while maintaining a seamless user experience.
- The computational intensity of generating new keys makes it economically unfeasible for most bots to exploit the system.
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Conclusion:
- By following this tutorial, you can create a secure alternative to Google reCAPTCHA that significantly reduces bandwidth usage and prevents malicious bot interactions.
- Thank you for watching and have a nice day!
By following these steps, you can create a secure alternative to Google reCAPTCHA that effectively prevents bots from interacting with your chatbot while minimizing the impact on legitimate users.