We have created the Personalization block for captcha & use in the web applications. we are successfully able to use the captcha in web applications. In the current configuration, 8 digit captcha getting generated. We need to use 6 digit captcha. Can you please help me to change the configuration as I am not able to find a way ahead?
Below is the link referred to create the Captcha personalization block.
I don't think it is possible to change the character limit in captcha
If the user can't find a captcha because it's too messy, too long, then user can ask for another captcha, and that's how it works. Moreover, reducing the number of character would just reduce the effectiveness of captcha.
If you really want it to be 6 digits then you will have to create a custom captcha.