Open Source: The source code is available to the public for anyone to audit.Offline Mode: Ability to generate 2FA codes without the need for the internet.Image by Jon Knight/Gadget Hacks Key Comparison Points That's why your best bet is an option with a software-based token, and that's the method supported by each of the apps on our list. These are less secure options as someone can access these methods remotely. Some websites only support sending the code via SMS or email. Not all websites support this feature, but most popular sites already do, and you can check compatibility using Two Factor Auth. Even if someone were to obtain your password, they'd also need physical access to your phone to retrieve a temporary passcode to unlock your account. While this second layer isn't foolproof, it does improve your defenses drastically. With 2FA, you need to have either your phone (or for some, your computer) nearby to log in, making it harder for a hacker far away to access your account. Your password serves as 'something you know,' and the 2FA app provides the 'something you have' aspect. With two-factor authentication, also known as 2FA, the service you're logging into will require two things to authenticate you: something you know and something you have. Two-factor authentication strengthens this by adding a second layer of security, giving you even more protection against online threats. A complex password (or one created with a password manager) does a good job of protecting your data, but it can still be cracked. When it comes to cybersecurity, one layer isn't enough.

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