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7.3.4 Mifare®
PLUS Virtual Card Select „nvcs‟
Use this command to retrieve the „real‟ UID of the transponder in a virtual card environment. If a card
is configured to show random IDs, the virtual card select command offers the possibility to retrieve the
UID in a fast and secure way. In order to get the UID, the 16 bytes Installation Identifiers of the card
and the reader must match. Furthermore, two AES keys are required. These are the Virtual Card
Polling Encryption key and the Virtual Card Polling MAC key. Please note, that only EEPROM keys
can be used.
Command:
‘nvcs[VCPEKey][VCPMACKey]’
Parameters
Description
[VCPEKey]
Virtual Card Polling Encryption EEPROM AES key (1 byte)
[VCPMACKey]
Virtual Card Polling MAC EEPROM AES key (1 byte)
Answer
Answer
Description
UID<CR><LF>
Real UID of the transponder
‘F<CR><LF>’
Error: Proximity check failed
‘R<CR><LF>’
Error: Parameter out of range
Example
Command
Description
‘nvcs5051<CR>’
Perform virtual card select, using EEPROM AES keys 00 and 01