Glossary

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Reset list
AES -  Advanced Encryption Standard: A secret-key encryption algorithm.
- Synonyms: NFCIP-2
Anti-collision -  A feature commonly used in contactless card systems to prevent conflicts between different signals competing for attention at the same time.
- Synonyms: NFCIP-2
APDU -  Application protocol datagram unit. These are the frames that are exchanged at application-level between an application running on the computer and a smartcard. The format of those frames is defined by ISO 7816-4 and checked by the system's PC/SC stack. The command (application to card) is called a C-APDU and consists at least of four bytes denoted CLA (class), INS (instruction), P1 and P2 (parameters). The response (card to application) is called a R-APDU and consists at least of two bytes denoted SW1, SW2 (status word). Note that this is a request/response scheme: the smartcard has no way to send something to the application unless the application asks for it.
- Synonyms: C-APDU, R-APDU, CLA, INS, P1, P2, SW, SW1, SW2, status word
API -  Application Programming Interface: A definition of calling conventions through which an application program accesses to other services such as the operating system, drivers, databases, or middleware layers.
- Synonyms: NFCIP-2
Applet -  A compact program that can be downloaded quickly and used by a remote computing device. Applets are typically written in Java.
- Synonyms: NFCIP-2
ATR -  Answer to reset: A message that is returned by a smartcard when it is powered up or when its reset pin is activated. The ATR indicates the card type, communication protocol and other basic information.
- Synonyms: NFCIP-2
Authentication -  The process whereby a card, terminal or person proves who they are. A fundamental part of many cryptography systems.
- Synonyms: NFCIP-2