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PROX'N'ROLL RFID SCANNER - Reference manual
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Information in this document is subject to change without notice. Reproduction without written permission of PRO ACTIVE is forbidden.
7. S
PECIFICATION OF
M
ASTER
C
ARDS
☺
This chapter is provided as a mean for security experts to evaluate the Master
Card architecture of
SpringCard RFID Scanners
.
Customers do not need to implement this part themselves, since
cfgfilecreator.exe
software is a convenient tool to create Master Cards. See
chapter 6 for details.
7.1. B
UILDING A
M
ASTER
C
ARD
The Master Card must be a Desfire 4k,
The reader tries to fetch configuration data from Desfire cards according to
the Master Card template specified in next paragraph. Data are protected by
an authentication key that may be changed on a per-customer or per-site
basis (i.e. Master Cards belonging to customer X will not work on customer
Y’s readers),
Before storing new settings in its non-volatile memory, the reader checks
that data comes with a valid digital signature. The signing key can’t be
changed, and is only known by
SpringCard
’s software. This ensure that only
data that has been pre-validated by a genuine software can be loaded in
reader’s non-volatile memory.
7.2. T
EMPLATE FOR
M
ASTER
C
ARDS
7.2.1. Location of data
Name
Tag
Description
Size
LOC.MAS
h
53
Location of data in master cards. See table
a
below.
5
a. Data location bytes
Offset
Length
Content
Specified value
0
3
Application IDentifier (AID).
h
504143
3
1
File IDentifier (FID) for configuration data.
h
01
4
1
File IDentifier (FID) for digital signature.
h
02