Hello smaynar
Actually the computation module, as the name indicates, is primarily for doing calculation and preforming typical IF,THEN type statements. What you need to assist with security is to implement the ini file feature. You can read about it here:
http://www.tectite.com/fmhowto/inifile.php
Depending in what you are looking to send the user, you may also need to implement Captcha module.
http://www.tectite.com/fmhowto/captchacreator.php
Good luck
Nelson
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