About the captcha code

I’m creating a admin web site, first step is login, There have a captcha option in the login page, How to create a captcha code in phoenix? I mean its like php can generate the captcha picture url, and use session to save and validate it.

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What about using something like recaptcha?

Much easier and most likely much more effective than implementing your own.

Yeah do not try to recreate a captcha, they are more easily read by bots than humans nowadays. If you want to do something yourself that have the login person answer a set of questions that only those in that community should know (not something like 2+4, also easily done by bots). However reCaptcha as @AstonJ said is definitely one of the best, especially if you use the most updated API’s for it.

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