What kind of website do you have? PHP? Specifically for php security, use a tool like to below to analyze and tell you what changes should be made. http://kb.mediatemple.net/questions/1700/Increase+PHP+security+with+PHPSecInfo#gs In general for your website, make sure your passwords are strong.
Start with a solid publishing platform, like Wordpress, but do not use free plugins that are relatively new or have low amounts of users using them. Many themes and plugins still have vulnerable timthumb.php scripts, which is allowing a lot of Wordpress blogs to be hacked but if you use a minimal amount of plugins, especially ones used by a lot of people (look for a lot of downloads, a lot of feedback and constantly updated) you will be fine.
Can you add some more information? What request are you making and what is the error message you see?
Can you explain which type of security do you want to ask, your website regarding or email regarding etc.Please explain more.
Use a password combination of symbols, numbers and letters, Don't use the name or address. Combinations will complicate the hackers.
Hiii security is the protection of information assets through the use of technology, In security forum site where you can discussion on security of hardwares.