A smart card, chip card, or integrated circuit(s) card (ICC), is defined as any pocket-sized card with embedded integrated circuits. Although there is a diverse range of applications, there are two broad categories of ICCs. Memory cards contain only non-volatile memory storage components, and perhaps some specific security logic. Microprocessor cards contain memory and microprocessor components.

The standard perception of a “smart card” is a microprocessor card of credit card dimensions (or smaller, e.g. the GSM SIM card) with various tamper-resistant properties (e.g. a secure crypto-processor, secure file system, human-readable features) and is capable of providing security services (e.g. confidentiality of information in the memory). Not all chip cards contain a microprocessor (eg. the memory cards), therefore not all chip cards are necessarily also smart cards. However, the public usage of the terminology is often inconsistent.

The major boom in smart card use came in the 1990s, with the introduction of the smart-card-based SIM used in GSM mobile phone equipment in Europe. Most wireless and wifi networks have a dependency on such systems for interoperability within payment and transaction levels of commerce.

Smart cards with contactless interfaces are becoming increasingly popular for payment and ticketing applications such as mass transit. Visa and MasterCard have agreed to an easy-to-implement version currently being deployed (2004-2006) in the USA. Across the globe, contactless fare collection systems are being implemented to drive efficiencies in public transit. The various standards emerging are local in focus and are not compatible, though the MIFARE card from Phillips has a considerable market share in the US and Europe.

Smart cards are also being introduced in personal identification and entitlement schemes at regional, national, and international levels. Citizen cards, drivers’ licences, and patient card schemes are becoming more prevalent, and contactless smart cards are being integrated into passports ICAO to enhance security for international travel.

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