Security

Database security denotes the system, processes, and procedures that protect a database from unauthorized activity.
DBMSs usually enforce security through access control, auditing, and encryption:
Access control manages who can connect to the database via authentication and what they can do via authorization.
Auditing records information about database activity: who, what, when, and possibly where.
Encryption protects data at the lowest possible level by storing and possibly transmitting data in an unreadable form. The DBMS encrypts data when it is added to the database and decrypts it when returning query results. This process can occur on the client side of a network connection to prevent unauthorized access at the point of use.