Thank you dear friend for providing an informative post on blockchain technology, its key features, and issues arising from its existing system. It is true that blockchain technology has unique features that make it secure, transparent, and decentralized. However, as you have highlighted, there are major issues such as security, scalability, energy consumption, and regulation that need to be addressed to ensure its full potential is achieved.

Moreover, you have given a clear and concise explanation of how blockchain technology works by combining cryptographic keys, peer-to-peer networks, and computing and storing transactions. This approach makes blockchain technology secure, transparent, and immutable, which is vital for keeping a highly accurate and secure record of prior acts.

Lastly, your explanation of zero-knowledge proof for authentication is very helpful. By providing validation of our information without revealing the actual information, zero-knowledge proof can be used for online authentication, especially on services that require identity verification. Overall, this post is insightful and informative. Keep up the good work! I have already posted my blog on the topic, if you have time plz do read that too