Talking about three risks and shortcomings of two-factor authentication

Although some people may use weak passwords that are easy to crack because they are too lazy to think about them, strong passwords are not indestructible. They may be intercepted, recorded by the keyboard, or compromised by big data attacks.

In the past few years, two-factor authentication (or two-factor authenTIcaTIon) has been increasingly adopted, mainly because a single password is too weak, and adding a second layer of protection can ensure a safer account. However, two-factor authentication is not impeccable. If you don't pay attention to the risk of neglect, it may "back bite" you.

Authentication factor type

Multi-factor authentication is a method that requires users to provide multiple proofs of identity confirmation. If the user is unable to provide all the verification factors accurately, the system will not grant access to their account. As the name suggests, two-factor authentication requires two confirmations.

Although multiple authentication factors can be used as part of the system, they usually fall into one of three categories:

̇Knowledge (what you know): If you can prove that you know certain information (such as personal identification number, security question answer and tax refund details), the system will accept you. ̇ own (what you have): If you can prove that you own a physical device - such as a USB key, card reader, SMS code, authentication Aapp and wireless volume label - the system will accept you. ̇ Intrinsic (who are you): The system accepts you through biometric comparisons, such as fingerprint scanners, retinal scanners, and speech recognition.

As with any system, the authentication system can also be problematic. Take a look at the three risks and shortcomings of two-factor authentication:

1. Factors may be lost

Your authentication factors may not be available when needed. Usually after an error occurs, you will be denied access to your account.

In the event that there is no power or the phone is damaged, you may not be able to get your SMS code as a second verification factor. Relying on a USB key as a second factor is also risky, and it's easy to drop it or accidentally send it to the laundry. If you trust factors such as personal identification number (PIN), you may always forget it, and biometric factors (such as eyes and fingerprints) may also fail due to an accident.

Recently, due to the inability to charge mobile phones, victims of Harvey and Irma found themselves unable to access their accounts. If you don't have a mobile phone, you won't be able to get authentication; if you don't have it, you won't be able to access your account.

Although account recovery is possible, it can be time consuming and difficult. In addition, if you protect multiple accounts with a single factor and lose this factor, you will need to recover all of these accounts.

2. False security

Two-factor authentication provides a level of security, but it is often exaggerated. For example, if you are denied access to a service because you have lost a factor, you are basically in the same dilemma as a hacker trying to steal your account. If you can reset your account without access factors, then hackers can.

Recovery options are often contradictory to the original intention of two-factor authentication, which is why companies like Apple have cancelled them. However, if there is no recovery option, your account may be lost forever.

There are also services like PayPal that use two-factor authentication, but they are not fully implemented. The company provided a second factor called "PayPal Security Key", but in 2014, it was completely bypassed.

All in all, this means you can use two-factor authentication, but your account is still unpredictable.

3. Self-restraint

Although two-factor authentication is to prevent hackers from intruding into your account, the opposite may happen. Hackers can set or reconfigure two-factor authentication to lock you out of their own accounts.

Two-factor authentication may not be enough to protect your account, but it may be too effective when you are not careful. Because using dual practices can improve services and make account recovery more difficult, it is reasonable to set up authentication for your necessary accounts before the hacker starts.

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