What is a blockchain?

It’s a very good start to explain what a blockchain is. Still today, far too many people make the amalgam between blockchain and cryptocurrency although this first can quite exist without the second. A blockchain is a technological means of storing and transmitting information without any control organ. Basically, the following analogy can be made: it is basically a distributed database (with a lot less features than a real DBMS) whose information is immutable and protected cryptographically.