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Chapter 4 General Oracle Security | sqlplus –s judy @report

The program will retrieve the password and feed it to the sqlplus executable. An execution of ps –aef on the UNIX prompt will not show the password.

Tip:  Make sure that no one types any kind of password in the command line. If passwords need to be passed from the command line, use a secured file to store the password and then use redirection to feed it to the program.

User Access Control

Once the machine is physically secured and the firewalls are protected, the next security vulnerability comes in the area of database access. The users need access to the database to perform their job functions.

When users wish to connect, the database makes sure that they are indeed authorized to access, a process known as Authentication. This can occur in several ways – the users could be defined as users in the database and then authenticated, or they may have been authenticated elsewhere and their credentials are passed on to the database as valid.

There are two ways the database authenticates users:

  • By password

  • By OS authentication

Let us discuss how they are different.

By Password

A user is created in the database with a password as in the following SQL command.

create user judy

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