Libraries tagged by proof-of-work

TYPO3 form element for spam protection by utilizing the proof-of-work mechanism ALtcha.

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Hashcash implementation in PHP.

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Altcha Captcha for Powermail - Accessible and GDPR compliant proof-of-work (pow) captcha for powermail, no external service required

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A PHP implementation of Cap - a lightweight, modern open-source CAPTCHA alternative using SHA-256 proof-of-work with comprehensive testing suite

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PHP version of Lockbot Captcha

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JSON Work Proof (JWP) - proof-of-work algorithm

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Proof of Work Captcha Field for Silverstripe CMS 5

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Proof of Work Captcha/Challenge/Brute Force protection for your browser and server, without any required user interaction.

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Coinhive Proof of Work Captcha for Yii2

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