Badmash & Atul : You can use the WP Security Scan plugin and read this post by QOT 9 Best WordPress Security Plugins

If you want to secure your wordpress blog than you can use some good plugins mentioned in wordpress directory . I am not a regular blogger but I think ashish is blogging from long period and hope he can share good plugin he must be using to secure his blog from these attacks .

I want to ask that do you recommend some good plugin for security purpose which can help our blog stay secure from hacking threats .

I always try to upload secure files but few months back one of my blog was hacked and that stupid guy deleted everything from my blog . all content and my bad luck that I didn't any backup for my blog .

So tips to make our blog and content secure will be helpful .

Thanks