Glossary term · A
Strong authentication
Definition
Strong authentication (or multi-factor authentication, MFA) requires the presentation of at least two distinct pieces of identity evidence to verify a user's identity. In the context of an advanced electronic signature (AES), it typically involves a combination of email + OTP SMS, strengthening the link between the signed document and its author. This is one of the requirements set by the eIDAS regulation for advanced-level signatures.
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