Modifications

The MAD sector may optionally be write-protected using KEY B if you wish to limit the ability of customers to modify the card contents. The public KEY A will ensure that they can always read the data.

The MAD sector may optionally be write-protected using KEY B if you wish to limit the ability of customers to modify the card contents. The public KEY A will ensure that they can always read the data.

=== Storing NDEF Messages in Mifare Sectors ===

== Storing NDEF Messages in Mifare Sectors ==

NDEF messages/records may be stored in any sector of the Mifare card, other than the sector(s) use by the MAD or sectors beyond the 1K range if a MAD1 table is used.  

NDEF messages/records may be stored in any sector of the Mifare card, other than the sector(s) use by the MAD or sectors beyond the 1K range if a MAD1 table is used.  

   0xD3    0xF7    0xD3    0xF7    0xD3    0xF7</nowiki>

   0xD3    0xF7    0xD3    0xF7    0xD3    0xF7</nowiki>

In order to store an NDEF Message on the Mifare Classic card, the message needs to be wrapped inside something called a TLV Block. The basic structure of a '''TLV''' Block is described below.  

In order to store an NDEF Message on the Mifare Classic card, the message needs to be wrapped inside something called a TLV Block. The basic structure of a '''TLV''' Block is described below.

== TLV Blocks ==

== TLV Blocks ==