Security databases pdf

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Documents Similar To Database Security. Mansoor Cp. Dharmesh Acharya. Aamir Raza. Andre Pacu. Viet Quang Vo. Rajalaxmi Panda. Munawwar Mohamed. Mira Mira. Anu Shrestha. Shariful Islam. Parveen Narayanan.

Akshay Ramrekha. Nelson Perez. Thomas Robinson. Devendra Namdev. Camilo Amarcy. Locking protocols restrict the set of possible schedules. If a crash occurs, the information in the log is used to restore the state of the system to a previous consistent sate.

During the transaction, all the temporary changes are recorded into a Shadow Copy, which is an exact copy of the original database plus the changes made by the transaction, which is the AFIM. On the other hand, if the transaction is not committed, then the database pointer is not updated. This is a simple scheme, but takes a lot of memory space and time to implement. They are sometimes referred as access controls. The process of authorization involves authenticating the user requesting access to objects.

A system administrator is responsible for allowing users to have access to the system by creating individual user accounts. A view is a virtual relation that does not actually exist in the database, but is produced upon request by a particular user, at the time of request. The user is not aware of the existence of any attributes or rows that are missing from the view.

DBMS should provide backup facilities to assist with the recovery of a database failure. There will be degradation in performance because of the time taken to decode it.

It also protects the data transmitted over communication lines.