![]() This security layer can prevent unwanted sensitive data leak, or exclude the possibility for any SQL injection attack, e.g. The main reason why a connection between SQL Server instance and any client application should be encrypted is authorized communication between them. However, self-signed certificates can be sufficient in SQL Server environment, as long as this kind of certificate follows the specified requirements (which are out of the scope of this article). Generally, trusted sources are specialized companies (digital certificates vendors). This means that a certificate must be “signed” by a trusted source. ![]() A trusted SSL certificate validates the SQL Server instance when the client application requests encrypted connection (or vice versa), while the SQL Server must be configured to follow the certificate authority (CA). ![]() However, the SSL can provide the encrypted connection and data transfer between a particular SQL Server instance and a client application. As the standard for securing the host-server interaction, Secure Sockets Layer or SSL is implemented in a Web environment.
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