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KED-3400 Operation
Key entry device - this page is a stub

This page describes some aspects of the operating procedure of the Crypto AG (Hagelin) KED-3400 key entry device, that was used to transfer cryptographic keys and other data to an HC-3400 compatible radio, such as the Ascom/Bosch/Motorola/Cryptovox SE-160 and SE-660.

Functions
The HC-3400 can be used for a variety of functions, including:

Zeroize
In case of an emergency, all data stored in the CMOS RAM of the KED-3400 can be purged by pressing the buttons
ECY
and
simultaneously. This procedure is commonly known as zeroizing. After pressing the two buttons together, the display seeks for confirmation:


If you really want to delete all data from the KED-3400, press YES
9
. If you do not want to delete the keys, press NO
0
. Once the device is cleared, it can no longer be used to program any radios, until new data has been entered by the system manager (SYS-MAN).

Press these two buttons simultaneously to purge all data
Create tripple keys
The table below gives a brief set of instructions on how to use the KED-3400 to generate or enter valid cryptographic keys, and distribute them to compatible crypto-enabled radios like the Ascom SE-160 and SE-660. In the description we have asumed that the 3-KEY E/A/S strategy is used.




Turn the device on by pressing
ON
. The display (1) shows two options: COURIER and SYS-MGR. Select SYS-MGR. The device now asks for a password. Unless it has been changed, the default password is 3400. Enter the password and press
Enter after which a menu will be shown:






Select EDIT. This produces a new menu with three options: UK-ID, KEY-D and SETUP-D. Select SETUP-D (4) and then select OP-PA from the menu that follows (5). Your are now asked to enter the desired key strategy (6). Assuming you want to use the 3-KEY strategy, enter
3
.




The system now asks if you want to override the default key (7). Answer 'yes' (Y) and press
again. If the display defaults to 'no' (N), press
before pressing
. Now return to the top level menu by pressing
TOP
. From the menu that appears (8), select EDIT followed by KEY-D (9) and then SPARE MORE (10). From the menu that appears, select SEL-CKS (11).










Now choose which key you want to replace: EXPIRED, ACTIVE or SPARE. Once you have pressed the corresponding button, press
TOP
to return to the top level menu. From this menu, press EDIT (9) followed by KEY-D (10) to reach the EDIT KEY-DATA menu again. Select GEN.




You can now generate a random key by pressing
GEN
(shift-7). This causes the internal random number generator to create a cryptographic key, that will be different each time the function is selected. The resulting display will look like this (note that the actual key will be different):


The key consists of 8 groups of 4 hexadecimal digits each. Press
to confirm the key. The display now changes to KEY 2. Repeat the above procedure for all 8 keys, or less if you don't need 8 keys. Once you are done, press
TOP
to go back to the top level menu. The display now asks for a 3-digit identifier for the keys. Enter the number and press
.






You are now at the top level menu again. Connect a suitable radio to one of the sockets at the left side. Ensure that the radio is turned ON and select SEND from the menu (16), followed by HC-3400 in the next menu (17). Then select ALL to send all key and setup data to the radio (18). The last step should be repeated for all crypto-enabled radios that are operated in the same network.






If all goes well, the KED-3400 should now try to connect to the radio and deliver its data. Once this is done, the display will shows the message DATA SENT SUCCESSFULLY. If the radio can not be contacted, the display shows the message: CONNECTION TO HC-3400 NOT ESTABLISHED.


Check the cables, verify that the radio is crypto-capable, ensure the radio is ON, and try again. If the problem persists, check the wiring of the cable between the KED-3400 and the radio.
Key distribution
For generating or entering keys, the user needs a password, as described above. This password is only required when accessing the SYS-MGR function (1). For distribution of keys to the radios, it is also possible to use the COURIER function. After switching ON, select COURIER, then SEND:






Further information
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Crypto Museum. Created: Saturday 24 June 2017. Last changed: Tuesday, 27 June 2017 - 07:44 CET.
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