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PROXRUNNER BLUETOOTH RFID SCANNER - Reference manual
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3.5.5. T=CL options
Name
Tag
Description
Size
OPT.DFR
h
t4
Desfire T=CL options.
1
Same as 7816-4 T=CL options (see 3.5.5).
3.5.6. Authentication key
Name
Tag
Description
Size
AUT.DFR
h
t5
Desfire authentication key. See table
a
below.
9 or 17
Default value : absent
(No authentication is performed, plain read operation is used to fetch the data)
a. Authentication key bytes
Offset
Length
Content
0
1
Desfire key index and options. See table
b
below.
1
8 or 16
Key value (8 bytes for a DES key, 16 bytes for a 3-DES key).
b. Key index and options
Bit
Value
Meaning
7 – 6
00
01
10
11
Communication mode for reading
Plain
MACed with session key
RFU
Enciphered with session key
5 – 4
00
01
10
11
Key diversification algorithm
Use the key “as is”
Diversify the key using Desfire SAM algorithm
Diversify the key using HMAC-MD5 algorithm
RFU
3 – 0
0000
to
1110
1111
Index of key in Desfire application
Index of the key to be used for authentication
RFU
