Well good job @fabhia I appreciate your efforts in creating this article.you have explained well about the topic overall.

Security and scalability are some hindrance in the implementation of the blockchain technology.You have also explained well about the key features of Blockchain technology.I agree with your points that you have explained in the features.

Technology are decentralization, immutability, and transparency.

Zero knowledge proof is good and advanced method for the athentication because it does not utilise the personal information of the users to verify them it also protect the data of websites from the hacking etc.

You have also explained well about the working of blockchain Technology that records transactions on the nodes.

There are many advantages of the blockchain technology,and also some drawbacks that causes hindrance in the implementation. Due to its advanced features its progressing day by day. If some issues in its implementation are resolved it will work in more better way.

Great efforts I wish you good luck in the contest.