Captcha and Encryption Key are two ways by which you can easily improve the security of your Magento 2 store. Captcha is known as a visual security check which ensures that a human being is interacting with the website rather than a computer bot. It has some code that a user has to enter whenever it is required.

The Encryption key in Magento 2 is used to protect passwords and other valuable data. During the Magento 2 installation process, Magento 2 generates a random encryption key. In this blog post, we will discuss how to enable Captcha and change the Encryption Key in Magento 2.

This useful article published on Magenticians blog:

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