Salesforce can require users to pass a simple text-entry user verification test to export data from Salesforce. This type of network-based security helps prevent malicious users from accessing your organization’s data, and can reduce the risk of automated attacks.
To pass the test, users must type two words displayed on an overlay into the overlay’s text box field, and click a Submit button. Salesforce uses CAPTCHA technology provided by reCaptcha to verify that a person, as opposed to an automated program, has correctly entered the text into the overlay. CAPTCHA stands for “Completely Automated Public Turing test to tell Computers and Humans Apart.”