Ultralight
has the same basic communication protocol as Mifare 1k and
4k cards but does not have the same level of mutual authentication
and CRYPTO protection.
For
this reason Ultralight cards are used for simpler financial
or ticketing applications and are often packaged as “paper
tickets” for single use applications.
Memory is organised at 4 byte Pages with Pages 0 and 1 containing
a factory programmed 7-byte unique serial number (UID) together
with other manufacturer and configuration information.
The
higher frequency operations allows communication rates up
to 106 kbaud and combined with the flexible memory structure,
Mifare Ultralight is a popular and low-cost read/write transponder
type.
Data
can be read/written to 4-byte Pages in one operation.
