This option controls what users need to do to access your paste. If you're having trouble with sharing pastes on other sites, try changing this option.
[Recommended Option]
None: No security is the normal option, in most cases, leave this option as none.
Captcha: Users will need to complete a captcha (I am not a robot box) before accessing your paste. They'll only need to do this once across the whole of Pastelink.
Login: Users will need to be logged in to Pastelink in order to view your paste. If they're logged in they also will skip the recaptcha if you choose the previous option.