What is an External Authenticator?

What is an External Authenticator?#

An external authenticator is a security device or software that verifies user identities outside the main system to enhance security during authentication processes. It operates independently of the user’s primary environment and is crucial in multi-factor authentication frameworks. External authenticators can be anything from hardware security keys to software applications that generate time-based, one-time passwords (OTPs).

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Detailed Explanation and Applications#

External authenticators are crucial for securing sensitive transactions and access to systems, particularly in environments that handle critical or sensitive information. Their implementation varies based on the system’s needs but generally follows a structured process:

1. Authentication Initiation:
   • A user attempts to access a secure service or application, triggering the authentication process.
2. External Verification:
   • The user provides credentials, typically through a device or software, that communicates with the authentication server via secure protocols.
3. Credential Validation:
   • The server verifies the credentials using the external authenticator, which may include biometric data, security keys, or one-time passwords.
4. Access Granting or Denial:
   • Based on the verification results, the system either grants access to the user or denies it, ensuring secure entry to authorized users only.

Common Types of External Authenticators#

• Hardware Security Keys:
  • Devices that users carry, such as YubiKeys.
• Software Authenticators:
  • Applications on a device that generate time-based codes.
• Biometric Systems:
  • Use unique user physical traits like fingerprints or facial recognition for authentication.

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External Authenticator FAQs#

How do external authenticators improve security?#

• External authenticators add a physical or software-based layer of security, making unauthorized access significantly more challenging by requiring something the user has or is.

Can external authenticators be used across different platforms?#

• Yes, many external authenticators are designed to be platform-agnostic, allowing them to function seamlessly across various operating systems and devices.

What should be done if an external authenticator is lost or stolen?#

• It is crucial to immediately revoke the device’s access permissions and, if possible, activate a secondary authentication method to maintain security.

About Corbado

Corbado is the Authentication Intelligence Platform for CIAM teams running consumer authentication at scale. We help you see what IDP logs and generic analytics tools can't: where passkeys, passwords, OTP, social login and fallback journeys succeed, stall or fail, which devices and browsers create friction, and when an OS update silently breaks login. Two products: Corbado Observe layers process mining and observability across authentication journeys. Corbado Connect adds managed passkeys with analytics built in alongside your IDP. VicRoads runs passkeys for 5M+ users with Corbado (+80% passkey activation). Talk to a Passkey Expert →