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Add an extra security step to sign into your account with 2-step verification. Find out how to turn on 2-step verification and receive a verification code, and how to turn off 2-step verification if you need to.
Having trouble signing in? Find out how to identify and correct common sign-in issues like problems with your username and password, account locks, looping logins, and other account access errors.
If there's something unusual about your sign in or recent activity, we'll ask you to go through another verification step after you've entered the correct password. This is an important security feature that helps to protect your account from unauthorized access. You may be prompted to get a verification code at your recovery phone number or recovery email address for any of the following ...
6-digit codes are commonly provided by proprietary hardware tokens from a number of vendors informing the default value of d. Truncation extracts 31 bits or decimal digits, meaning that d can be at most 10, with the 10th digit adding less variation, taking values of 0, 1, and 2 (i.e., 0.3 digits).
The app is first installed on a smartphone to use Authenticator. It must be set up for each site with which it is to be used: the site provides a shared secret key to the user over a secure channel, to be stored in the Authenticator app. This secret key will be used for all future logins to the site. To log into a site or service that uses two-factor authentication and supports Authenticator ...
While time-based one-time password (TOTPs) (e.g. 6-digit codes generated on Google Authenticator) were a significant improvement over SMS-based security codes, a number of security vulnerabilities were still possible to exploit, which U2F sought to improve.
Sometimes the old "turn it off and on again" actually works. In this case, try completely signing out of your account then sign back in. Many times, this will help, especially in cases of bad passwords or some simple browser issues.
A personal identification number (PIN), PIN code, or sometimes redundantly a PIN number, is a numeric (sometimes alpha-numeric) passcode used in the process of authenticating a user accessing a system. The PIN has been the key to facilitating the private data exchange between different data-processing centers in computer networks for financial ...