OMNIKEY HF MIFARE Easy Module - RFID Webshop
OMNIKEY HF MIFARE Easy Module - RFID Webshop
OMNIKEY HF MIFARE Easy Module - RFID Webshop
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<strong>HF</strong> <strong>MIFARE</strong> <strong>Easy</strong> <strong>Module</strong><br />
User Manual, Firmware V1.0<br />
1506-USM-01-0-03<br />
2.6 <strong>MIFARE</strong>® DESFire<br />
This tag supports additional security algorithms (DES, Triple-DES, MAC) for security sensitive<br />
applications.<br />
DESFire tags are addressed using a specific command set (see DESFire command set).<br />
2.6.1 Memory organization<br />
The memory of a DESFire card can be personalized to own requirements. The card can be seen<br />
as data storage like a hard disk in a PC. The memory is divided in up to 28 different applications<br />
(directories) and with 16 files each. An application has up to 14 keys. Depending on keys and<br />
access conditions a file can be accessed in four different ways. Plain data is never secured. Data<br />
is secured using a MAC, single DES or triple DES enciphers.<br />
Following figure describes the memory organization of a DESFire card.<br />
DESFire card (Application 0)<br />
Application 1 Application 2<br />
File<br />
ID 1<br />
File<br />
ID 2<br />
File<br />
ID 1<br />
File<br />
ID 2<br />
File<br />
ID 3<br />
…<br />
File<br />
ID 3<br />
…<br />
…<br />
Figure 2-6: DESFire memory organization<br />
November 4, 2008 Page 13 of 63<br />
© 2008 HID Global Corporation. All rights reserved.
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