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cheapest version is the Mifare Ultralight, which usually serves as a
disposable ticket.
Mifare T=CL cards use secure elements of the same type as contact
chip cards, and essentially provide the same type of service.
The most highly developed card is Mifare DESfire, which has a
larger memory and an advanced operating system, as well as AES and
3DES encryption protocols.
Mifare cards serve numerous applications. The most common
include: the reading of a serial number, to trigger a particular action if
that number is accepted by the reader; the reading of an ID memorized
on the card; or data storage. For the first application, we use the card’s
serial number, which is encoded on 4 or 7 bytes. In the second case,
the ID must be entered into the card, which may encrypt it, provided it
has a secure element capable of carrying out cryptographic
computations.
6.22. NFC (Near-Field Comunication)
The NFC standard is a special case of RFID communications. It
facilitates communication between an RFID and a reader over a
distance of up to ten centimeters. This is contactless communication,
with, for instance, a chip card or a secure microcontroller.
There are numerous and varied applications of this type. The best
known is payment over a mobile phone. With his/her mobile, a client
can top up his/her account with a simple phone call or low-data-rate
data transfer to a server. Once the account is topped up, the mobile
serves as a key to pay for a whole range of services. For example, to
buy a subway ticket, we need only hold the mobile near the reader for
radio communication to validate the purchase of the ticket.
NFC data rates are fairly low: 106, 212, 424 and 848 Kbps. The
frequency range is around 13.56 MHz. The standards in this field were
issued by the ISO/IEC. The NFC Forum was set up by Philips and
Sony.
www.it-ebooks.info
cheapest version is the Mifare Ultralight, which usually serves as a
disposable ticket.
Mifare T=CL cards use secure elements of the same type as contact
chip cards, and essentially provide the same type of service.
The most highly developed card is Mifare DESfire, which has a
larger memory and an advanced operating system, as well as AES and
3DES encryption protocols.
Mifare cards serve numerous applications. The most common
include: the reading of a serial number, to trigger a particular action if
that number is accepted by the reader; the reading of an ID memorized
on the card; or data storage. For the first application, we use the card’s
serial number, which is encoded on 4 or 7 bytes. In the second case,
the ID must be entered into the card, which may encrypt it, provided it
has a secure element capable of carrying out cryptographic
computations.
6.22. NFC (Near-Field Comunication)
The NFC standard is a special case of RFID communications. It
facilitates communication between an RFID and a reader over a
distance of up to ten centimeters. This is contactless communication,
with, for instance, a chip card or a secure microcontroller.
There are numerous and varied applications of this type. The best
known is payment over a mobile phone. With his/her mobile, a client
can top up his/her account with a simple phone call or low-data-rate
data transfer to a server. Once the account is topped up, the mobile
serves as a key to pay for a whole range of services. For example, to
buy a subway ticket, we need only hold the mobile near the reader for
radio communication to validate the purchase of the ticket.
NFC data rates are fairly low: 106, 212, 424 and 848 Kbps. The
frequency range is around 13.56 MHz. The standards in this field were
issued by the ISO/IEC. The NFC Forum was set up by Philips and
Sony.
www.it-ebooks.info