Understand what 2FA is and how it protects your data and personal information from identity theft, phishing, and more. It is highly recommended to enable two-factor authentication (2FA) to increase security against hackers and identity thieves.
What is Two-factor Authentication (2FA)?
Two factor authentication (2FA) is a security system requiring two types of identification for access. It can secure smartphones, online accounts or doors. 2FA involves using a password or PIN and an additional passcode sent to the user’s phone, or a fingerprint, to gain access. It is sometimes referred to as MultiFactor authentication or MFA.
How Does Two-factor Authentication Work?
Two-factor authentication helps stop unauthorised users from accessing an account with just a stolen password. Users may face a higher risk of password theft, especially if they reuse passwords across websites. Downloading software and clicking email links can also lead to stolen passwords.
Two-factor authentication combines two of these elements:
- Something you know, like your password.
- Something you have, such as a verification code sent to your smartphone or an authenticator app.
- Something you are, like your fingerprint or face.
2FA isn’t limited to online use. Think of a garage door having a lock and key and an additional key for an alarm system that needs to be deactivated before opening the door.
Why Do We Need 2FA?
In a world without passwords, strong web security requires a dynamic approach with multiple tools and policies. Never rely on just one method for full protection. If you’re using only passwords, it’s time to upgrade. Start with 2FA to add a layer of security. While 2FA is an essential tool, it works best as part of a coordinated security strategy with multiple applications and policies.
Authentication Methods for 2FA
Two-factor authentication offers different methods. Here’s a list of popular options.
Authentication Application
Using some sort of application to set up, track and deliver 2FA or MFA codes is the easiest secure method of tracking codes. Applications from Microsoft, Google, Authy, Duo and many others can provide this functionality, and any good password manager should also offer this functionality.
Push Notifications
Push two-factor authentication doesn’t need a password. This 2FA type sends a notification to your phone to approve or deny access to a website or app, verifying your identity.
Hardware Tokens
Businesses can provide employees with security key fob hardware tokens. These tokens generate codes every few seconds or minutes. This method is one of the oldest forms of two-factor authentication. It is very secure, but is complex and potentially expensive to deploy.
Voice-based Authentication
Voice authentication is like push notifications but uses automation to confirm your identity. You will be asked to press a key or say your name to identify yourself.
SMS Verification
SMS, or text messaging, serves as two-factor authentication by sending a message to a trusted phone number. The user must interact with the text or use 2FA one-time code to verify their identity on a site or app. This is one of the least secure methods as your SIM card may be cloned and we would not recommend this unless there is no other option.
Multi-factor Authentication vs. Two-factor Authentication (MFA vs. 2FA)
2FA is part of multi-factor authentication (MFA). MFA needs users to confirm multiple factors before access is granted. This reduces the risk of breaches by ensuring users are who they claim to be. The difference between 2FA and MFA is that 2FA requires only one extra authentication factor. Attackers can crack factors like passwords or ID cards. Businesses should add more factors to increase the level of security. Secure environments often use combinations of physical, knowledge, and biometric authentication. They may also consider geolocation, device used, access time, and behaviour verification.
The main goal is to balance user-friendliness with the security a business needs. Employees prefer fast and reliable authentication solutions. They avoid slow and cumbersome processes that hinder their work.
Is 2FA secure?
Using multiple authentication factors is more secure than just a username and password. So, two-factor authentication (2FA) is safer than using only one password. Multi-factor authentication (MFA) can be even more secure than 2FA by requiring more factors. However, 2FA has its flaws. Hardware tokens can be risky if the manufacturer has a security breach. This happened to RSA in 2011 when their SecurID tokens were hacked. Other factors have issues, too. SMS 2FA is easy and cheap but can be attacked by cybercriminals. The National Institute of Standards and Technology (NIST) advises against SMS 2FA due to its vulnerabilities. Despite these problems, 2FA is useful for protecting businesses from remote cyberattacks.
3 Downsides to Two-factor Authentication (2FA)
Multi-factor authentication, including 2FA, is a reliable way to prevent unauthorised access to networks and systems. However, it has some downsides:
- Longer login times: Users must complete an extra step to log in, which takes more time, although a good password manager can actually speed it up.
- Integration: 2FA often depends on third-party services, like text message verification from a cell provider. If these services fail, it can cause continuity issues.
- Maintenance: Without a good strategy for managing the user database, maintaining a 2FA system can be troublesome.
FAQs
How long does two-factor authentication last?
The length of time a two-factor authentication session lasts can vary. Users usually stay logged in until they log out or are inactive. Some systems may require two-factor re-authentication after a set period of inactivity. This timeframe depends on the security settings of the specific application or service. It ensures continued protection against unauthorised access.
Can hackers beat two-factor authentication?
Most 2FA methods send temporary codes through SMS or email, which hackers can intercept using account takeover, SIM swapping, or MitM attacks. Businesses should use authenticator apps such as Google Authenticator or Microsoft Authenticator or a good password manager to avoid these risks.
What happens if you lose your phone with 2-factor authentication?
If you’ve lost access to your 2FA mobile device, recover your account using backup codes, a secondary email or phone number, or contact customer support. Be prepared to confirm your identity with security questions or ID proof.
Can someone get into your account if you have two-factor authentication?
Stealing devices or hardware tokens can jeopardise 2FA security. If a hacker physically accesses your device or token, they might bypass authentication and access your accounts without permission.
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