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Authenticator Definition: An authenticator is a security measure that verifies the identity of a user attempting to access a system or application, typically through something the user knows (password), possesses (security token), or is (biometric data).
An authenticator in cybersecurity is a method used to verify the identity of a user attempting to access a system or service. This can include something the user knows (such as a password or PIN), something they have (such as a security token or smart card), or something they are (biometric data like fingerprints or facial recognition).Authenticators are crucial in ensuring only authorized users can access sensitive information or systems.