Clef provides easy-to-use strong two-factor authentication using smartphones.
https://wordpress.org/plugins/wpclef/
Widgets · WordPress Plugins
Get access to data on 136,750 websites that are Clef Two-Factor Authentication Customers. We know of 4,759 live websites using Clef Two-Factor Authentication and an additional 131,991 sites that used Clef Two-Factor Authentication historically and 2,231 websites in the United States.
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Get a list of 136,750 websites using Clef Two-Factor Authentication which includes location information, hosting data, contact details, 4,759 currently live websites and an additional 879 domains that redirect to sites in this list. 131,991 sites that used this technology previouslyand 2,231 websites in the United States currently using Clef Two-Factor Authentication.
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