What Is Fast IDentity Online (FIDO)? – A Security Measure To Replace Passwords For Strong Protection

As many things continue changing in our current digital landscape, the traditional passwords are also no longer sufficient to protect our online accounts from cyber threats. Phishing attacks, data breaches, and password reuse have highlighted the vulnerabilities of password-based authentication. The need for stronger security measures, the FIDO Alliance has developed Fast IDentity Online (FIDO) which is very open and standardized set of authentication protocols. FIDO aims to replace passwords with more secure and user-friendly authentication methods, revolutionizing the way we authenticate ourselves online.

What is FIDO (Fast IDentity Online)?

FIDO (Fast IDentity Online) is an open and standardized set of authentication protocols that aim to replace traditional passwords with more secure and user-friendly authentication methods. Developed by the FIDO Alliance, a consortium of leading tech companies, FIDO provides a framework for strong authentication that enhances security while improving the user experience.

The FIDO Alliance: Revolutionizing Authentication Standards

The FIDO Alliance was established in 2013 as a collaborative effort between prominent tech companies, government agencies, financial institutions, and other industries, which its primary objective is to eliminate the reliance on passwords across websites, apps, and devices.

Membership and Industry Leaders

With over 250 members, the FIDO Alliance boasts an impressive roster of global tech leaders spanning enterprise, payments, telecom, government, and healthcare sectors. Esteemed companies like Microsoft, Google, Apple, Amazon, Facebook, Mastercard, American Express, VISA, PayPal, and OneSpan hold board-level memberships.

FIDO Authentication

FIDO authentication, developed by the FIDO Alliance, aims to enhance authentication standards and reduce dependence on passwords for desktops and mobile devices. This innovative approach prioritizes security and privacy by ensuring that private keys and biometrics, if utilized, never leave the user’s device. Instead of remembering complex passwords, users can authenticate themselves through methods like fingerprint scanning or one-time PINs.

Wide Browser and OS Support

Notably, FIDO authentication is supported by major browsers and operating systems, including Windows 10, Android, Google Chrome, Mozilla Firefox, Microsoft Edge, and Apple Safari. This widespread adoption ensures seamless integration and compatibility across various platforms.

The Need for Strong Authentication

Traditional static passwords are vulnerable to cybercriminals who exploit phishing, malware, and other malicious techniques. Furthermore, the prevalence of data breaches has exposed vast amounts of personal information on the Dark Web, leading to a surge in financial fraud such as account takeovers and social engineering attacks. In response, governments and regulators have introduced cybersecurity and data security laws mandating multi-factor authentication (MFA) and strong customer authentication (SCA) for financial institutions and organizations.

The FIDO Alliance recognizes the urgency to protect online accounts and systems with robust authentication methods instead of relying solely on passwords. With public awareness of data breaches on the rise, recent high-profile incidents involving companies like Yahoo, Marriott, and Equifax have reinforced the critical need for strong authentication measures.

How FIDO Authentication Enables Passwordless Login

The FIDO Alliance has revolutionized the concept of authentication by developing specifications and certifications that enable passwordless login across various platforms. These specifications are interoperable with hardware and mobile authenticators from multiple vendors, as well as biometric authentication methods like facial recognition. By leveraging public key cryptography, FIDO authentication standards offer a secure and user-friendly login experience for web and online services, all at a lower cost.

Introducing FIDO2: The Future of Authentication

FIDO2 is the latest protocol introduced by the FIDO Alliance, offering enhanced convenience and security compared to traditional password protection. Approved by the World Wide Web Consortium (W3C), FIDO2 combines two essential components: the W3C’s Web Authentication (WebAuthn) protocol and the FIDO Alliance’s Client-to-Authenticator Protocol (CTAP). Together, these elements enable seamless authentication.


CTAP eliminates the need for passwords by allowing users to authenticate using a security key or their mobile phone. These authentication credentials are securely communicated to the user’s device via USB, Bluetooth, or NFC (Near Field Communication). This streamlined approach makes it easier to authenticate to web browsers and enhances the overall user experience.


WebAuthn empowers online services to utilize FIDO authentication through a standardized web API. This API can be integrated into web browsers, enabling seamless communication between devices and online services. Users can identify themselves using biometrics, PINs, or external FIDO authenticators to a FIDO2 server associated with a website or web app. The compatibility of FIDO2 with previously certified FIDO security hardware ensures a smooth transition to this advanced authentication protocol.

How FIDO Authentication Improves Security and Privacy

FIDO authentication is designed to significantly improve security and protect user privacy. By leveraging public key cryptography and eliminating the need for passwords, FIDO offers several advantages over traditional authentication methods.

The Role of Public Key Infrastructure (PKI)

FIDO authentication is built upon the foundation of public key infrastructure (PKI), which enables to secure information exchanges over unsecure networks by using cryptographic keys. When a user interacts with an online service, such as a banking app, the communication between the server and the user’s device needs to be encrypted. This is achieved through a private and public key pair. The public key is registered with the online service, while the client’s private key remains securely stored on the user’s device. This ensures that sensitive information is protected and eliminates the risk of server-side secrets being compromised by cybercriminals.

Preserving User Privacy

FIDO authentication prioritizes user privacy by preventing the tracking of user information across different online services. With FIDO, no information is shared between the public and private keys in order to ensure that user data remains secure and isolated. When authenticating to an online service that supports FIDO authentication, users can choose a FIDO2 authenticator device, such as a hardware key or a FIDO-enabled smartphone. The authenticator is unlocked by using a PIN, fingerprint, facial scan, or a button on the device, eliminating the need for a password. This approach enhances privacy by minimizing the reliance on shared secrets and reducing the risk of data breaches.

How FIDO authentication helps To Mitigate Phishing and Man-in-the-Middle Attacks

FIDO authentication significantly reduces the risk of phishing attacks, which are commonly used by cybercriminals to trick users into divulging their usernames, passwords, and sensitive information. By eliminating passwords, FIDO removes the weakest link in the authentication chain. Additionally, FIDO authentication combats Man-in-the-Middle (MITM) attacks, where an attacker intercepts and alters communications between a user’s device and an online service’s server. FIDO’s specifications ensure that private keys and biometric templates never leave the user’s device and are never stored on a server. Each transaction is uniquely encrypted, minimizing the attack surface for cybercriminals. By requiring a PIN, fingerprint, or facial scan, FIDO authentication verifies the authenticity of the user, preventing remote hackers or trojans from gaining unauthorized access.


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