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What are the Best Passwordless Authentication Methods?

what are the best passwordless authentication methods FIDO2 and Smart Card Authentication
01 Mar 2024

What is Passwordless Authentication?

In our modern operating atmosphere, secure and compliant authentication methods have never been more crucial. With cyber threats evolving at an unprecedented pace, traditional password-based systems increasingly leave individuals and organizations vulnerable to a plethora of security breaches. These old techniques, reliant on memorized secrets, are susceptible to phishing, brute force attacks, and social engineering tactics, exposing sensitive data to unauthorized access.

On the other hand, passwordless authentication emerges as a beacon of security and convenience, eliminating the weakest link in security chains: the password itself. By leveraging what users have (like a mobile device or security key) or what they know (via secret PIN), passwordless methods significantly reduce the risk of account compromise while enhancing user experience.

In this post, we will take a look into and rank the three most prominent passwordless authentication technologies from worst to best: Phone-based authentication, Certificate-Based Authentication (CBA), and FIDO2. We’ll be assessing their strengths and weaknesses to determine the most effective means to safeguard our data on our quest for true zero-trust authentication. Let’s begin and see exactly what the best passwordless authentication method is for your organization.


Phone-based authentication, lauded for its user-friendliness and wide accessibility, stands out as a popular choice in the realm of passwordless security measures. The majority of users, already accustomed to their mobile devices, find it straightforward to receive SMS or notifications, a testament to the method’s convenience and broad reach. Virtually everyone with a mobile phone is capable of engaging with this form of authentication, making it an inclusive option. However, this approach is not without its flaws. It is particularly vulnerable to a range of security threats, including SIM swapping, phishing attacks, and interception, posing significant risks to the integrity of users’ data.

Additionally, its effectiveness is heavily dependent on the reliability of phone networks, which can render it less dependable in regions suffering from poor mobile coverage. This reliance introduces a potential point of failure, undermining the security and accessibility that make phone-based authentication appealing in the first place.

Certificate-Based Authentication (CBA) - The Most Compatible

Certificate-Based Authentication (CBA) distinguishes itself in the passwordless authentication landscape through its utilization of digital certificates for user authentication, marking a significant advancement in securing digital identities. By leveraging cryptographic keys embedded within these certificates, CBA provides a level of security robust enough to meet the stringent requirements of large organizations seeking scalable and secure access control solutions. Its capacity to facilitate secure, scalable authentication processes makes it an attractive choice for enterprises needing to safeguard vast networks and sensitive data. However, the sophistication of CBA comes with its challenges. The deployment and ongoing management of a certificate-based infrastructure demands a considerable amount of technical expertise and resources, making it complex to implement and maintain. That being said, modern tools like EZCA and EZCMS have significantly streamlined this process, making is simple for any modern security practitioner, regardless of proficiency or experience in PKI, to sure-up their security posture in just minutes using CBA! CBA’s exceptionally potent combination of strong security measures and scalability clearly indicates its value, offering enhanced security over simpler methods while acknowledging the need for careful consideration in its application to ensure user accessibility and system manageability.

FIDO2 – The Most Modern

FIDO2 represents a cutting-edge leap in passwordless authentication technology, ingeniously incorporating its core components - WebAuthn and CTAP - to forge a seamless and secure user authentication experience. This method stands out for its utilization of cryptographic login credentials, which are uniquely generated for each website, securely residing on the user’s device without ever being transmitted to or stored on a server. This not only elevates security but also champions user privacy by allowing individuals to authenticate without the need to disclose their identity or personal information. FIDO2 is designed with user convenience in mind, primarily relying on hardware security keys to facilitate an intuitive and hassle-free authentication process.

Despite its numerous advantages, FIDO2’s journey towards universal adoption faces hurdles, notably in the form of inconsistent support across different platforms and browsers. Because it’s so cutting edge, not every platform yet accommodates it. That being said, you can surely bet that in the near future it will be supported almost everywhere.


Nevertheless, the unparalleled combination of high security, privacy protection, and ease of use positions FIDO2 as the premier choice among passwordless authentication methods. FIDO2’s potential to redefine digital security and user experience is undeniable, marking it as a pivotal development in the ongoing evolution of authentication technologies.

Which Passwordless Method Is Best for My Organization

Now that we have look at the pros and cons of each passwordless authentication let’s talk about what’s right for your organization. Are you familiar with the phrase, “there’s no one-size-fits-all” approach? It’s true, and without question applies to this scenario about going passwordless. For example, does the intern in the mail room need the same level of protection that your CISO or C-Suite? Probably not…almost certainly not. Anyway, what I’m getting at here is that you don’t need to choose just one method! In fact you can choose whichever method (or combination of methods) works best for everyone within your organization. Most people operate under the misconception that you must choose one method and stick to it across your organization WRONG! We’ve run into organizations all over the globe that employ things from phone to smartcard to FIDO2 for various groups or members within the organization. With the flexibility of today’s modern security infrastructure, there’s no need to limit yourself to just one method. Use whatever is going to be most convenient (and secure) for the different groups and members within your organization.


How to Go Passwordless

As we navigate through the complexities of digital security in today’s rapidly evolving operating environment, the transition to passwordless authentication emerges not just as an innovative option, but as an imperative strategy for organizations aiming to fortify their defenses, streamline operations, and realize significant cost savings. Embracing passwordless methods directly addresses the most pressing threats that compromise organizational integrity, drastically reducing the risk of breaches that have become all too common with traditional password systems. The tangible return on investment (ROI) from adopting passwordless solutions extends beyond enhancing security measures. It also offers substantial financial benefits, including operational efficiencies and potential savings on cyber insurance premiums, given the lower risk profile of such systems.

For organizations looking to embark on the journey towards zero trust, the Keytos security team stands ready to guide you through every step of the process. Whether you prefer a direct conversation to tailor a passwordless strategy that best fits your needs or choose to explore at your own pace through our extensive documentation, we are here to support you. Our YouTube channel is rich with tutorials and step-by-step guides, meticulously designed to provide you with the knowledge and tools necessary for a seamless transition. Additionally, our documentation on how to implement EZCMS for passwordless authentication offers granular, actionable insights to ensure a smooth integration into your existing systems.

We invite you to reach out at your convenience to discuss how we can help secure your operations against the cyber threats of tomorrow. Embrace the future of cybersecurity with Keytos and take a decisive step towards a more secure, efficient, and cost-effective digital environment. Your journey towards passwordless authentication begins today, promising not just enhanced security, but a strategic advantage over those pesky little hackers trying to steal our data.

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