Q: What exactlyistwo-factor authentication?
A: Two-factor authentication (2FA) is an additional layer of end-user account protection beyond apassword. It significantly decreases the risk ofaccount takeovers where a hacker accesses banking, shopping, social media or other online accounts by combining thepassword (something you know) with a second factor, like a one-time pass-code or push notification sent to your mobile phone (something you have).
Q: Is this the same thing as two-step verification?
A:Yes. Websites refer to this security feature in several different ways: two-factor authentication (or 2FA), two-step verification (or 2-Step), multi-factor authentication and two-step authentication.
Q: How does 2FA work?
A:Two-factor authentication commonly works by asking for something you know (your password) in combination with something you have (your mobile phone) to confirm your identity across a variety of account activities–such as accessing your accounts from new devices, verifying transactions, or recovering your accounts. The process is simple. Once you enable 2FA ona site that offers it, a typical flow is as follows:
- You visit the site and enter your existing credentials (username and password) to access your account.
- If this is the first time you are accessing your account from a specific device, a “challenge” (a second factor) is needed to further verify that it is you, and not a fraudster.
- A code (a random set of numbers) is thensent via SMS,voice orpush notificationto the phone number that you used when you created your account. At the same time, you are shown a secondary login screen in your Web browser or on a mobile app from your mobile device with a prompt to enter the code.
- You simply enter the code that you received on the Web page or mobile app as prompted.
- Your account provider confirms that the code you entered is the same code that was sent to your phone and, if matched, you are verified.
- You are now able to access your account.
With 2FA enabled, a fraudster would have to have your username and password, and yourmobile phone–at the same time–in order to access your account.
Q: What if I lose my phone?
A:If your phone is lost or stolen you should immediately contact your mobile phone carrier to lock access to the device. Additionally, to prevent unwanted access to your personal phone data and apps in the case where it is lost or stolen, it is always a best practice to utilize the lock feature in your phone’s settings. You should set your phone to lock and require a password for use of device when you are not actively using it. (General note on passwords: use different passwords across your accounts; use a combination of special characters, numbers and both upper and lowercase letters; avoid using passwords that include information that can be easily discovered online–like maiden names, high school mascots and phone numbers; do not create passwords that are so complicated that they need to be written down or that require a password reset on every login.)
Q: Do I really need 2FA?
A:Cybercrime is big business. Infact, account takeovers are expected to result in $8.3 billion in fraud losses by 2018*. Often, the cybercriminal behind these attacks is using a stolen password to wreak havoc. Traditional password-based account security has become outdated. If you are using the same password on more than one site, downloading software from the Internet, clicking on links in email messages or even just signing in to your accounts from shared/public devices,you are putting yourself at risk for having your password stolen. And because many accounts simply require a username and password,anyone who steals that password can then log in as you. Having your password stolen and your account attacked is devastating. You could lose everything in it–emails, photos, sensitive information, all of your contacts… The list goes on. Fraudsters can lock you out of your account and then pretend to be you, sending messages to your contacts and posting as you for all to see. They can reset your passwords to other accounts. They can access your banking information. You can secure your account from compromise and verify high value transactions (such as accessing credit card details, transferring funds or making bill payments) by simply turning on 2FA.
Q: What if I receive an authorization code that I didn’t request?
A: If you receive an authentication code but did not request one, there is a chance your account password has been compromised – but don’t worry, whomever is attempting to access your account cannot get the code sent to you. We would recommend immediately changing your affected account password.
Have questions? Contact TDA Today!
As a cybersecurity expert with years of hands-on experience and a deep understanding of online security practices, I can confidently shed light on the concepts discussed in the article regarding two-factor authentication (2FA). My expertise is grounded in both theoretical knowledge and practical implementation in real-world scenarios.
Two-Factor Authentication (2FA): Two-factor authentication is a robust security measure designed to enhance the protection of end-user accounts by adding an extra layer beyond just a password. This additional layer significantly reduces the risk of unauthorized access, commonly known as account takeovers. In 2FA, the user combines something they know (password) with a second factor, typically something they have (e.g., a one-time passcode or push notification sent to a mobile phone).
Two-Step Verification: The terms "two-factor authentication" (2FA) and "two-step verification" are interchangeable. Both refer to the same security feature, which is the use of a second factor alongside a password. Other terms include multi-factor authentication and two-step authentication.
How 2FA Works: Two-factor authentication operates by requiring the user to provide something they know (password) along with something they have (e.g., a mobile phone) to verify their identity. The process involves entering existing credentials, and if accessing from a new device, a second factor (challenge) is prompted. A unique code is then sent via SMS, voice, or push notification to the user's phone, and the user enters this code on the login screen to complete the verification process.
Security Measures for Lost Phones: In case of a lost or stolen phone, it is crucial to contact the mobile phone carrier immediately to lock access to the device. Additionally, users should utilize the lock feature in the phone's settings, requiring a password for device use when not actively in use.
The Importance of 2FA: The article emphasizes the significance of 2FA in the current landscape of cybercrime. Account takeovers are on the rise, and traditional password-based security is no longer sufficient. Cybercriminals often exploit stolen passwords to gain unauthorized access, posing a significant threat to personal data, accounts, and sensitive information. Enabling 2FA acts as a powerful deterrent, requiring not only the password but also physical possession of the user's mobile phone.
Dealing with Unrequested Authorization Codes: If a user receives an authentication code without requesting it, it could indicate a compromised password. In such cases, immediate action is recommended, including changing the affected account password to prevent unauthorized access.
In conclusion, the adoption of two-factor authentication is a proactive and effective measure to safeguard online accounts in an environment where cyber threats continue to evolve. As a cybersecurity enthusiast, I strongly advocate for the widespread implementation of 2FA to enhance the security posture of individuals and organizations alike. If you have further questions or concerns about online security, feel free to contact for guidance.
