The CLA byte defines an application-specific class of instructions. In a command-response pair, the command message and the response message may contain data, thus inducing four cases which are summarized in the table below.Ī C-APDU consists of a required header (CLA INS P1 P2) and an optional body ( ). Therefore a specific response corresponds to a specific command, referred to as a command-response pair.Īn application protocol data unit (APDU) contains either a command message or a response message, sent from the interface device to the card or conversely. The structure of the APDU is defined by ISO/ IEC 7816-4 Organization, security and commands for interchange.Ī step in an application protocol consists of sending a command, processing it in the receiving entity and sending back the response. In the context of smart cards, an Application Protocol Data Unit (APDU) is the communication unit between a smart card reader and a smart card. Power LogOn® Enterprise Identity Management Software.eHealthONE™ Patient EHR Management Software.BIOSID™ Pro Tablet Biometric Mobile Identity.BIOSID™ Tablet Biometric Mobile Identity.IDBX™ Instant Biometric Smart Card Issuance.CEE™ Instant Smart Card Personalization.
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March 2023
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