WordPress Security plugins

1.WP Login Security 2
This plugin sends a verification email to the user’s email address if he tries to log in from a different IP address. Only after the user validates the IP address he be allowed in.
2.Login Security Solution
This is a bouncer plugin. This plugin, enforces password strength and password resets for all users. It also lets you log out idle sessions automatically.
3.WordPress Firewall 2
This plugin inspects all incoming traffic and identifies if anyone sends malicious requests or tries to inject any data into your database.
4.Block Bad Queries
This plugin extends your firewall and assist filter incoming traffic to stop hackers.