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Strong Authentication is the authentication (identification and authorization checking) by one entity on another entity on the basis of a digital attribute. It is usually used to identify users (and client components) to systems (and server components). Strong Authentication differs from regular (conventional) authentication in that the latter is based on a "Shared secret" known by the two parties. The two parties are: the to-be authenticated party (users and client components) and the authenticator party (system and server components). Strong Authentication does not use a shared secret. Strong Authentication uses, instead, asymmetric encryption, meaning the to-be-authenticated party (users and client components) knows a secret (Private Key), which nobody else knows.
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