Single sign-on; Multi-factor authentication is the type of authentication have you implemented.
What is an authentication?
Authentication is the act of proving an assertion, such as a computer system user's identification. Authentication is the method of verifying a person's or thing's identity, as opposed to identification, which is the act of indicating that identity. It could entail validating personal identification documents, verifying the authenticity of a website with a digital certificate, carbon dating an artefact, or guaranteeing that a product or document is not counterfeit. Authentication is important in a variety of industries. A recurring difficulty in art, antiques, and anthropology is proving that a certain artefact was created by a specific individual or in a specific area or period of history. Verifying a user's identity is frequently required in computer science to give access to secret data or systems.
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