Title: silentCAPTCHA Complexity
Last modified: July 29, 2024

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# silentCAPTCHA Complexity

 *  Resolved [michaelmartin73](https://wordpress.org/support/users/michaelmartin73/)
 * (@michaelmartin73)
 * [1 year, 10 months ago](https://wordpress.org/support/topic/silentcaptcha-complexity/)
 * Hello Paul, please can you give me a short breakdown of what the challenge complexity
   options are best used for? I have had a look at the help file page given in the
   WP dashboard ([https://getshieldsecurity.com/blog/silentcaptcha-wordpress/](https://getshieldsecurity.com/blog/silentcaptcha-wordpress/))
   but wasn’t able to work out which option I should use in the drop down from this.
   It has defaulted to Medium, but I see there is an Adaptive setting also amongst
   others. But I’m not sure which to use. Thank you for your assistance.
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fsilentcaptcha-complexity%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 2 replies - 1 through 2 (of 2 total)

 *  Plugin Author [Paul](https://wordpress.org/support/users/paultgoodchild/)
 * (@paultgoodchild)
 * [1 year, 10 months ago](https://wordpress.org/support/topic/silentcaptcha-complexity/#post-17919546)
 * Hi,
 * From the reference article, you’ll see that our CAPTCHA system uses the “proof
   of work” model. This basically means we present a complex task – something that
   is compute intensive – to the visitor, and ask them to solve the problem/challenge.
 * The complexity of the challenge is as it sounds – how hard or how much effort/
   work will it take to solve the challenge. Ideally you’ll want the challenge to
   be a challenging as possible, but legitimate visitors with slow/old devices may
   take longer to solve the challenge. So if you expect your normal visitors to 
   be predominantly running on mobile, or older devices, choose a lower challenge
   complexity.
 * If you choose “adaptive”, then Shield will present a challenge complexity based
   on how the visitor is presenting (typically the `useragent`).
 * Hope that helps.
 *  Thread Starter [michaelmartin73](https://wordpress.org/support/users/michaelmartin73/)
 * (@michaelmartin73)
 * [1 year, 10 months ago](https://wordpress.org/support/topic/silentcaptcha-complexity/#post-17920154)
 * Thank you Paul I will try the adaptive setting then and see how it goes.

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘silentCAPTCHA Complexity’ is closed to new replies.

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 * 2 replies
 * 2 participants
 * Last reply from: [michaelmartin73](https://wordpress.org/support/users/michaelmartin73/)
 * Last activity: [1 year, 10 months ago](https://wordpress.org/support/topic/silentcaptcha-complexity/#post-17920154)
 * Status: resolved