Some database management systems offer which masks confidential data within database fields so that it cannot be accessed by unauthorized users.

Data masking

Explanation:

Data masking is the process of hiding sensitive information within databases so that they cannot be accessed by unauthorized users.

The masking of data should be real and meaningful to the application.

It is also required for the masked values should be consistent across all databases if that particular masked value is used again in different databases.

What is done in most organisation is that the format of the data remains the same while masking the data however the values get changed. Similarly there are other ways of data masking which includes applying encryption techniques, stuffing a character in between, beginning or at the end and substituting the words.