Clef provides easy-to-use strong two-factor authentication using smartphones.
https://wordpress.org/plugins/wpclef/
Widgets · WordPress Plugins
Get access to data on 139,039 websites that are Clef Two-Factor Authentication Customers. We know of 4,697 live websites using Clef Two-Factor Authentication and an additional 134,342 sites that used Clef Two-Factor Authentication historically and 2,225 websites in the United States.
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Get a list of 139,039 websites using Clef Two-Factor Authentication which includes location information, hosting data, contact details, 4,697 currently live websites and an additional 866 domains that redirect to sites in this list. 134,342 sites that used this technology previouslyand 2,225 websites in the United States currently using Clef Two-Factor Authentication.
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