what is the diffrence between hashing and encryption

Question

This Question has been running in my mind for a very long time. Can anyone please answer

1. What makes Hash different from encryption

2. When to use what?

Answer 1

In hash, you can't get the actual data back

For Example: If your data is hashed, then you can't get the actual data back, so to compare if the data which you have now is same as the data which is already present, then hash the present data and compare only the hashed data, since you can't retrieve the original data.

  Original data: SUNSHINE

hashed data 1: q345gjseiwueiwjr39

Present data: SUNSHINE

Hashed data 2: q345gjseiwueiwjr39

Since hashed data 1 == hashed data 2 it is equal

Where in the case of Encryption, you can get the data back

For example: You will have some encryption algorithm to encrypt the data so that your data is protected

Data: SUNSHINE

Encryption:ENIHSNUS

Use case:

For storing the password in a database or somewhere where you think the data should not be retrieved by anyone go for hashing

But if you want to retrieve your data like Card No or something which have to be protected but retrieved back then go for encryption.