Securing Microsoft SQL Server

Hi,
their are several ways to secure your SQL Server
1). Strengthen Password Mechanism
2). Using NTFS File System
3). Change the Port of SQL Server other than default
4). Use named instance
5). Set firewall
6). Using Windows Authentication
7). Using EFS

i would suggest to refer below links for more :
http://vyaskn.tripod.com/sql_server_security_best_practices.htm

www.microsoft.com/technet/prodtechnol/sql/2000/maintain/sqlc2.mspx -- C2 Audit

http://www.sql-server-performance.com/ck_database_encryption.asp

http://www.sqlservercentral.com/columnists/bkelley/implementing_efs.asp

http://www.microsoft.com/sql/prodinfo/previousversions/securingsqlserver.mspx

Regards