Explanatory Dictionary Archive

ICCD

Integrated Circuit Card Device. A particular implementation of CCID, where the "reader" and the "smartcard" are a single device. The "smartcard" is actually an electronic component and not a plastic card.

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CCID

Circuit Card Interface Device. A subset of the USB specification that is the standard for USB based smartcard readers.

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USB

Universal Serial Bus. A standard Input/Output bus that supports very high transmission rates. Up to 120 devices can be daisy-chained to a USB port.

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UART

A universal asynchronous receiver/transmitter (usually abbreviated UART, which is pronounced "you art") is a type of "asynchronous receiver/transmitter", a piece of computer hardware that translates data between parallel and serial interfaces. Used for serial data telecommunication, a UART converts bytes of data to and from serial bit streams represented as electrical impulses similar to Morse code. UARTs are commonly used in conjunction with other communication standards such as RS-232.

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TTL

Transistor-Transistor Logic. All standardized common TTL circuits operate with a 5 volt power supply. A TTL signal is defined as "low" or L when between 0V and 0.8V with respect to the ground terminal, and "high" or H when between 2V and 5V.

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Terminal

Any device that can communicate with a smart card (e.g., reader, coupler…). Certain terminals can operate in standalone mode, while others must be connected to a central information system to access an application.

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SIM

Subscriber Identification Module. A smart card for mobile phone systems (GSM) holding the subscriber’s ID number, security information and memory for a personal directory of numbers thus allowing him to call from any device.

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SHA-1

A hash algorithm developed by the National Institute of Standards and Technology and the National Security Agency.

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