Using Data Encryption

One-way hashing

Hashing is a very useful tool for encrypting data in PostgreSQL. When we use one-way hashing, the transformation of our data from plaintext to encrypted text happens at an atomic level. That means it’s irreversible and can’t be undone once completed. The encryption algorithm ensures that the original data can never be reconstructed from the encrypted data.

One-way hashing is sometimes called cryptographic hashing or simply hashing. Many types of one-way hashing algorithms are available, including MD5 and SHA256. Each type uses a unique mathematical algorithm.

One of the most common uses of one-way hashing is to store login credentials and other sensitive information securely. Using a one-way hashing algorithm, we can encrypt our user’s passwords or private keys to prevent unauthorized users from accessing them.

Using one-way hashing for storing passwords

The command to use one-way hashing for storing passwords in PostgreSQL is given below: