How to encrypt fields in oracle sql

Oracle provides two field encryption methods: Row-based encryption: Use AES to encrypt the entire row of data. Column-based encryption: Encrypt specific columns using AES or RSA.

How to use SQL to encrypt Oracle fields

In Oracle database, encrypting fields can protect sensitive data Protect from unauthorized access. This article describes two methods of encrypting Oracle fields: row-based encryption and column-based encryption.

Row-based encryption

Row-based encryption uses the Advanced Encryption Standard (AES) algorithm to encrypt an entire row of data. This method is suitable for situations where all fields need to be encrypted.

<code class="sql">ALTER TABLE table_name
ENCRYPT USING 'AES256';</code>

Column-based encryption

Column-based encryption allows you to encrypt only specific columns. It uses the AES algorithm or other encryption algorithms such as RSA using Key Wrapping Format (KWF).

Use AES

<code class="sql">ALTER TABLE table_name
MODIFY (column_name ENCRYPT USING 'AES256');</code>

Use KWF

<code class="sql">CREATE WRAPPING KEY kw_name IDENTIFIED BY 'key_value' FORMAT 'KWF';
ALTER TABLE table_name
MODIFY (column_name ENCRYPT USING 'AES256' ENCRYPTED BY WRAPPING KEY kw_name);</code>

Decrypt data

Decrypt the data using the following syntax:

<code class="sql">SELECT DECRYPT(column_name) FROM table_name;</code>

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