What is Blockchain and Blockchain Technology? How does it work and how secure is it? It is made up of two words. The chain of the first block and the second chain. Block means a lot of data blocks in Blockchain technology. Meaning that the data of cryptocurrency is kept in these blocks. Different boxes contain currency, ie data, and they are linked to each other. You must know about bitcoin, but do you know on which technology bitcoin works. If you do not know, then it does not matter, in this article, we will talk about 'Blockchain Technology' on which bitcoin works.