Security has become the number 1 thing to think about in WordPress these days. The graphic below show the most popular security plugins available for WordPress. This is by no means a complete list but does showcase the op downloaded plugins available in the WordPress repository.
My top choice and recommendation from the list below would be:
Wordfence Security 3.8.1
- Version: 3.8.1
- Author: Mark Maunder
- Last Updated: 4 weeks ago
- Requires WordPress Version: 3.3.1 or higher
- Compatible up to: 3.5.2
- Downloaded: 703,638 times
- WordPress.org Plugin Page »
- Plugin Homepage »
and one plugin not in the list would be
Antispam Bee 2.5.8
- Version: 2.5.8
- Author: Sergej Müller
- Last Updated: 3 days ago
- Requires WordPress Version: 3.4 or higher
- Compatible up to: 3.6
- Downloaded: 562,917 times
- WordPress.org Plugin Page »
- Plugin Homepage »
remember to not add multiple security plugins as they can and do conflict with one another..