- https://www.youtube.com/playlist?list=PLgH5QX0i9K3qLcx9DvVDWmNJ7riPvxzCD
- https://medium.com/@emekadc/how-to-implement-one-to-one-one-to-many-and-many-to-many-relationships-when-designing-a-database-9da2de684710
- https://www.edupointbd.com/sorting-and-indexing-of-database-ev/
- https://medium.com/vaultree/an-introduction-to-database-encryption-807fd94159d6
- https://www.geeksforgeeks.org/difference-between-symmetric-and-asymmetric-key-encryption/