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The Protocol for Lightweight Authentication of IDentity (PLAID) is an authentication protocol that uses standards-based symmetric and asymmetric cryptography in a unique way to protect the communications between smart cards and terminal devices. Extremely fast and highly secure strong authentication of the smart card and data objects is possible without exposing card or cardholder identifying information or any other repeating information useful to an attacker. PLAID is being developed by the Australian government for use in all of their identity credentials and is proposed to ISO for open reference.
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