Operating the wall terminal
OMEGA FLEX wall terminals WT-I/WT-II Page 45 of 80
7.2
DESFire EV1 Transponder (locking
media)
You use DESFire EV-1 locking media in two different modes:
7.2.1
DESFire EV-1 in security mode (optional)
Locking devices and locking media operating in the security mode
(1) are manufactured exclusively by CEStronics and programmed
with individual keys and special firmware.
The data transmission between the locking device and the locking
medium is encrypted. Only locking media that are authenticated
by the device are authorized to lock or unlock.
This ensures a very high protection against manipulation.
These locking devices (1) will not accept any foreign transponders
(2); they do not respond to any locking or unlocking attempt with
other locking media.
A DESFire EV-1 locking medium manufactured by CEStronics
operating in the security mode can be used in other systems (3)
requiring this type of transponder.
This ensures the multi-application capability of the locking
medium.
Fig. 25 – DESFire operating principle
