Hashing - what it is, how it's used and why it matters - with MD5 and SHA2-256 examples

total number of data is a, total number of hash values is b, what if a>b. then two pieces of data could have the same hash???

great work, great knowledge and great teaching

How does the unhashing work on system?

Imagine my surprise when I noticed your PowerLevel10k shell prompt - complete with emoji.

Hi,what caused the collision?

You've done a great job explaining unexplainable! Thanks. Very thorough step by step tutorial based on examples for non-tech human beings.