Mifare 13.56 MHz RFID technology and main variants
The Mifare standard for RFID was originally defined by Philips in 1994 for use in non-contact electronic ticketing and was later described in the ISO / IEC 14443A standard for 13 , 56 MHz non-contact smart cards. Therefore, there is no emphasis on large reading distance, which is typically up to 8 cm using common tags and readers. Mifare is used eg. in the travel card in Denmark....
Mifare 13.56 MHz RFID technology and main variants
The Mifare standard for RFID was originally defined by Philips in 1994 for use in non-contact electronic ticketing and was later described in the ISO / IEC 14443A standard for 13 , 56 MHz non-contact smart cards. Therefore, there is no emphasis on large reading distance, which is typically up to 8 cm using common tags and readers. Mifare is used eg. in the travel card in Denmark. Mifare tags, like tags for the EM standard for 125 KHz, have a unique ID (UID) - but also have built-in memory that is stored in "sectors" in the tag.
Mifare technology available in several variants. Mifare Classic is provided with 1k or 4k memory organized in sectors. Mifare UltraLight has 512 bytes of memory in sectors - but otherwise works as Mifare Classic. MIfare PRO Works as a "smart card" with CPU and the ability to insert an operating system into the tag, so it's probably the most flexible of the Mifare technologies. In addition, there is a dedicated processor built-in for DES encryption to allow data to be secured against unwanted access.
Mifare DESFire supports AES encryption as well as DES and 3DES encryption when accessing sector data in the tag. Therefore, data with very high security can be protected against unwanted reading and copying. Works as a "smart card" with cpu and operating system built into a PROM area in the tag optimized for fast reading of data. Can use UID of up to 64 bits.
