Security Guide : 1. Introduction to Vector Security : Data at Rest Encryption
 
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Data at Rest Encryption
Specific database table columns can be encrypted to enhance data security, ensure privacy, and protect media that contains database records holding sensitive information. Data in the protected columns is stored on disk or other media in encrypted form and can only be accessed if the encryption passphrase is known.
Data at rest encryption protects table information, transaction information, and full database backups.