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Instant 2FA - Add two-factor auth to any site in minutes
Rapid 2FA - A painless way to add two-factor authentication to your site
TypingDNA Authenticator - 2FA codes in your browser, secured by the way you type
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Google Titan - A 2FA device to protect yourself from hackers
Hydro Mobile App - Free, instant, scalable, blockchain-based 2FA security