install captcha and improve security to prevent spammers from hacking site

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
I have some issues with spam e-mails and need to secure 2 web sites from being hacked.
I want to install captcha on all relevant pages and am open to any other suggestion to improve security for both sites.

Skills required:
Computer Security, Web Security
Hire floodline
Project posted by:
floodline United States
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