Differences between Multi-Factor Authentication and Passwordless Authentication

Mesut Oezdil
4 min readMay 1, 2023

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How can we make sure our passwords stay safe? Ever forgotten a password or found it hard to come up with a strong one? This Monday, let’s break down two concepts we hear all the time and understand the key differences between them.

We’re often told to mix letters, numbers, and symbols to make our passwords harder to guess, but that alone isn’t enough. Using unique passwords for each account is crucial, and avoiding easy-to-guess information like your name or birthday can make all the difference. These are all practices from the early days of passwords, and while they’re still important, there’s more to consider. Keeping your devices up to date with the latest security patches, and being careful about emails, links, and downloads are essential steps to add extra layers of security and keep your accounts protected.

https://www.transmitsecurity.com/blog/passwordless-authentication-guide

On top of all that, there are two more powerful ways to secure your accounts: Passwordless Authentication and Multi-Factor Authentication (MFA). Passwordless Authentication, which we’ll dive into in this week’s article, lets you access your accounts using credentials stored on your trusted devices, with no password needed. Meanwhile, Multi-Factor Authentication (MFA) adds an extra layer of security by requiring one or more additional verification steps — like a code sent to your phone — on top of your username and password. These methods make your accounts even more secure and help protect against unauthorized access.

Multi-Factor Authentication

Multi-Factor Authentication (MFA) is a security method that requires users to verify their identity through multiple forms of authentication before accessing their online accounts. Unlike traditional methods that rely only on a password or username/password combination, MFA adds a layer of protection. It can use various types of authentication, such as biometric data (like fingerprints or face recognition), SMS codes, or authentication apps on mobile devices. Generally, at least two of these factors are required to successfully access an account, making it much harder for unauthorized users to gain access.

https://www.nist.gov/back-basics-multi-factor-authentication

For example, a user might be required to provide both a password and a fingerprint scan or a password along with a code sent to their mobile device. This combination makes it much harder for attackers to gain unauthorized access, even if they obtain the user’s password through a data breach or other methods. MFA is becoming increasingly popular as a security measure, especially for sensitive accounts like online banking or health portals. However, it’s important to remember that MFA is not foolproof — it can still be vulnerable to certain attacks, such as phishing or social engineering, so while it’s a strong security practice, it’s not entirely flawless.

Passwordless Authentication

Perfect for when we forget our password or struggle to come up with a strong one, MFA provides a secure way to access our accounts without having to remember and type a password each time. Instead, we can use unique forms of authentication like a fingerprint, facial recognition, or even a trusted device like a smartphone to verify our identity. It’s a more convenient and secure alternative to traditional password-based logins.

https://www.strongdm.com/blog/passwordless-authentication

We can also receive a one-time code through an app or text message to verify our identity. Ideally, passwordless authentication is more secure than traditional passwords since there’s nothing to intercept or forget. Plus, it’s a simpler way to log in — you don’t have to remember all those passwords, making it both a safer and more convenient option.

Conclusion

Since Aristotle’s definition of man as zôon politikon (a political animal), there has been much debate on human nature. Here’s a new take: “Man is a digital animal.” As digital beings, we must stay alert, choose strong authentication methods, and build robust security layers that are hard to compromise. However, it’s just as important to acknowledge that none of these methods are flawless, and we still face vulnerabilities and potential attacks, even with the best security practices.

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Mesut Oezdil
Mesut Oezdil

Written by Mesut Oezdil

I'm on the Substack now, not on Medium. AR-KUBE: Where AI meets DevSecOps! Exploring and sharing trends in AI-driven, security-focused DevOps.

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