How does SQL Server provide security and authentication?
SQL Server supports multiple encryption options: Secure Sockets Layer (SSL) encrypts traffic as it travels between the server instance and client application, much like internet traffic is secured between browser and server. Additionally, the client can validate the server’s identity using the server’s certificate.
How does SQL authentication work?
When using SQL Server Authentication, logins are created in SQL Server that are not based on Windows user accounts. Both the user name and the password are created by using SQL Server and stored in SQL Server. When using SQL Server Authentication, you must set strong passwords for all SQL Server accounts.
When to assign securables to a SQL Server role?
When server or database roles would give a user too much or too little access, you can assign one or more securables instead. Securables exist at the server, schema and database levels; they are SQL Server resources that can be accessed by server and user logins.
When to select SQL user with a password?
Select SQL user with password or a SQL user with login based on a SQL Server authentication login, when the person connecting cannot authenticate with Windows. This is common when people outside of your organization (for example customers) are connecting to your SQL Server. TIP!
When do I need to create a database user?
Logins in the master database are common for the people who manage the SQL Server and for people who need to access many or all of the database on the instance of SQL Server. For this situation, you will create a SQL user with login. The database user is the identity of the login when it is connected to a database.
How are security identifiers used in SQL Server?
Once you are connected to SQL Server instance, you will typically need access to a particular database. To allow access to a database, this login must be mapped to a database user. Internally within SQL Server, a login is mapped and identified to a user using security identifier (SID).