The database is the heart of handling data in a software application. Unless it is not an in-memory database, the database stores data on the disk as a file. Your application may be running on a remote server, and the database also resides on a remote server. Your application may collect sensitive data such as passwords, bank account data, health data, etc. The databases that persist data in a disk use a file to store data of a database. Imagine a hacker login into your database server and stolen your database file. Now, unfortunately, a hacker is able to access all of your information by reading that file. So, how could you overcome this problem?
Hide Data With Encryption
Encryption is commonly used in day-to-day network communication to hide data from the third party. Encryption scrambles your data by a given key. Only the person who knows the right key can read the real message. Encryption could be either symmetric or asymmetric. In this case, we just need symmetric encryption since the user does not need to generate a shared secret.