Security+ certifications is one of the very few credible certs available in the area of computer and network security. Other being CCNA Security and CISSP. The certification is offered by Comptia organization, on successful completion of security+ exam. Comptia also offers other certs like A+, Network+, Linux+ and a few more and these certs are widely recognized across USA and sevral other countries. Please check out the site if you are preparing for any of these certifications.