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PROXRUNNER BLUETOOTH RFID SCANNER - Reference manual
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3.3.5. Authentication key
Depending on the size, the AUT.MIF tag can either be
A pointer to a key located in RC’s secure EEPROM when size = 1.
The Mifare key itself, when size = 7,
A master key and its diversification options, when size = 9 or 17
When the AUT.MIF tag is absent, all EEPROM keys are tried out in sequence (this
can take a long time…).
Name
Tag
Description
Size
AUT.MIF
h
t5
Mifare authentication key.
See below
Default value : absent
a. Size = 1 : pointer to a key in RC’s secure EEPROM
Values
h
00 to
h
0F refer to type A keys
d
0 to
d
15, respectively,
Values
h
80 to
h
8F refer to type B keys
d
0 to
d
15, respectively.
b. Size = 7 : specified Mifare key
Offset
Length
Content
0
1
Key options. See table
c
below.
1
6
Mifare key value.
c. Key options bits, when size = 7
Bit
Value
Meaning
7
0
1
Key is an A key
Key is a B key
6 – 0
RFU
d. Size = 17 : master key diversification using HMAC-MD5
Offset
Length
Content
0
1
Key options. See table
e
below.
1
16
Master key value.
e. Key options bits, when size = 17
Bit
Value
Meaning
7
0
1
Diversified key is an A key
Diversified key is a B key
6
0
1
Diversification with card UID and address fixed to
h
00
Diversification with card UID and address = sector number
5 – 4
10
Diversify the key using HMAC-MD5 algorithm
3 – 0
RFU
