Security in CodeIgniter

[eluser]Peng Kong[/eluser]
Also remember to safe guard against SQL Injection by
using CI's database active record class to build you SQL queries.
if you must type raw queries remember to use escape them with something like $this->db->escape()

security is a huge topic... there isn't a 3-step program to making your app 100% secure.
If you're interested i suggest reading wikipedia's web security exploits and think about how you are going to protect against each attack.
http://en.wikipedia.org/wiki/Category:We...y_exploits