Authy offers a powerful combination of authentication options. Dynamic seven digit authentication one-time pass codes are generated on-demand, and delivered via SMS or text-to-speech phone calls to a registered number. Get a new seven digit authentication code every twenty seconds. Available via the Authy app for mobile, wearable, or desktop platforms. Approve or deny the authentication request with a simple yes/no question. Push notifications alert on a previously authorized smartphone. Passwords aren't enough anymore—use a second factor to confidently verify users' identity and protect your app or service from data loss, fraud, and malicious attacks.