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Hagelin FILL SE-580 → SE-660 → SE-160 →
Key entry device
KED-3400 is a combined key generator
and key distribution device,
developed around 1992 by
Crypto AG (Hagelin) in Zug (Switzerland),
for use in combination with the HC-3400 embedded encryption unit,
such as used in the Ascom 1 SE-160
and SE-660 two-way FM mobile radios.
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The device is housed in a die-cast aluminium enclosure that
is nearly identical to that of the
HC-5200 electronic message unit.
It measures 22 x 11 x 3.5 cm and weights just under 1 kg.
The device is powered by a single 9V battery that is installed in a
compartment at the bottom.
The control panel has 26 rubber keys, a buzzer
and a display with two lines of 40 character each. Keys can be generated by the
built-in random number generator, but can also be entered manually on
the keyboard. Once generated, the keys can be transferred to a
compatible mobile crypto radio.
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In addition, they can be transferred to another KED-3400 unit for
further key distribution. The device can hold up to 8 single keys, each of
which is 32 hexadecimal digits long. Furthermore, it is possible to follow
the so-called 3-KEY strategy, in which each device is given three keys,
known as the past or expired key (E), the current or active
key (A) and the future or spare key (S).
By default, the Active Key (A) is used, but by using the 3-KEY strategy,
secure communication is also possible with devices that are still on the
Expired Key (E) or are already on the new Spare Key (S). By giving each
key a 3-digit ID, radios will automatically select the appropriate crypto key.
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Around 2000, the mobile radio division of Ascom
was first taken over by Bosch and then by
Motorola.
The latter consolidated the trunking radio marked and then shut down
the Ascom business.
➤ More
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All controls of the KED-3400 are on the top surface of the device,
as shown in the diagram below. The radio is powered by a single
9V block battery 1 that is installed behind a
lid at the bottom.
Press ON to turn the device ON.
Press ON again at any moment to turn it OFF again.
If no buttons are pressed, the device turns itself off after
approximately one minute of inactivity.
At the top left is the 2 x 40 character liquid crystal display (LCD).
The rest of the control panel is taken by the 26 rubber keys. The function
of each key is printed on the key top. If a key has a second (shift)
function, it is printed above it. They five keys below the LCD have no
text on them. Their function will be shown on the display as and when
appropriate.
At the left side are two sockets, a 10-pin NF10 and a 6-pin LEMO,
for connection to the device to be programmed.
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Remove the 9V battery if the device will be stored for a long
period of time, in order to prevent damage caused by
leaking batteries.
Note that ALL batteries will eventually leak, even professional ones.
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The HC-3400 can be used for a variety of functions, including:
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The following devices are known to be HC-3400 compatible:
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The image on the right shows how the KED-3400 is connected to
an SE-160 handheld radio.
A sideways adapter
is used to connect the 6-pin LEMO cable
to side of the SE-160.
The sideways connector can be locked in place by fastening the
large screw at the center, but as programming takes just a few seconds,
it is also possible to press it firmly against the side of the
radio. Once the two devices are connected, a few key-presses
are needed to initiate a transfer.
➤ About the SE-160
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The image on the right shows how the KED-3400 is connected to
an SE-660 mobile radio.
An adapter with an RJ45 plug is used to connect
the 6-pin LEMO cable to the microphone socket at the front panel
of the SE-660.
Once the two devices are connected, a key transfer can be
initiated with just a few key-presses.
An I2C interface 1 is used for this.
➤ More about the SE-660
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The SE-580 was a portable radio, commonly used in trunking
radio networks, such as
Actionet, SpeedCom, RegioNet, Chekker and Traxys.
It was built on the basis of a Nokia Mobira radio
and could optionally be extended with a HC-3400 CRYPTOVOX
encryption unit.
The radio was sold by Crypto AG (Hagelin)
as the CRYPTOVOX SE-580
and is interoperable with the SE-160
and SE-660.
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The KED-3400 can also be used to transfer keys (and other
parameters) to another KED-3400 unit, or to a
KDD-3400 Key Distribution Device,
for further distribution of the keys.
It is currently unknown which socket and which cable
was used for a KED-to-KED transfer, but the standard LEMO
cable that is used for a radio transfer, does not work.
No picture available
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In addition to the KED-3400, which was often too big for
handling in the field, Crypto AG also produced the smaller
and lightweight key distribution device KDD-3400. It provides
an easy way of loading keys into a radio (filling).
The KDD-3400 is only capable of distributing bare keys.
It can not be used for entering or generating keys, like
the KED-3400. The KDD-3400 itself should be filled with a
KED-3400.
No picture available
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I2C is also known as I2C and IIC.
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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).
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For generating or entering keys, the user needs a password, as
described here.
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:
➤ Full operating instructions
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The interior is very similar to that of the HC-5200
with probably only the interface board
and the firmware being different.
It consists of a full-size flex-PCB that holds the keyboard (again, identical
to that of the HC-5200), a large PCB and three smaller PCB plug-in or
daughter cards.
The board at the top left holds the CPU (central processing unit), whilst the
one at the top right holds the internal power supply unit (PSU).
The board at the bottom right contains the interfaces for communication with
the attached radios. An I2C interface is used for
the SE-160
and SE-660.
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Note the blue ½AA-size battery at the font edge. It is mounted to the larger
main board, in a cut-out space of the interface board. It serves as a backup for
the internal CMOS RAM (key) memory. As a result, the keys are retained even when
the main 9V battery is exhausted or removed. The backup battery has to be
replaced every five years. The reason for using CMOS RAM (rather than flash
memory) is that the keys may have to be purged (zeroized)
in case of a distress situation.
The main power for the device is provided by a single 9V block battery that
is installed behind a removable lid
at the bottom side. This battery should
be removed when the unit is not used for a longer period if time, to avoid
damage caused by leakage. Note that eventually all batteries,
even professional ones, will leak.
Luckily however, as the battery is held in a sealed compartment that is part
of the bottom panel, it will not cause damage to the interior when it
starts leaking.
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The pinout of this socket is currently unknown.
The socket is probably used for KED-to-KED cloning,
for which a 10-way one-to-one wired cable should work.
This has not yet been tested.
The diagram below shows the pinout of the NF10 socket
when looking into the socket.
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The 6-pin LEMO socket is used for transferring key material to the radio.
In a standard transfer cable, only pins 1, 2 and 5 are wired for the IIC bus.
The purpose of the other pins is currently unknown. The diagram below shows
the pinout of the 6-pin female LEMO socket, when looking into the socket from
the left side of the device.
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- IIC Data (ZDA) · yellow
- IIC Clock (ZCL) · green
- not connected
- not connected
- Ground · brown
- Power input +12V (optional)
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CAG-3400-01 LEMO cable 40 cm CAG-3400-03 LEMO cable 1.5 m CAG-3400-04 Adapter for connection to SE-660 CAG-564.997-A Adapter for connection to SE-160 ? KED-KED cloning cable
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Number of keys 8 Key length 32 digits Power supply Standard 9V block battery Backup battery 1/2 AA-size 3.6V, 0.95 Ah, Lithium Thionyl Chloride cell (internal)
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E Expired (past) A Active (current) S Spare (future)
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© Crypto Museum. Created: Saturday 24 June 2017. Last changed: Sunday, 14 June 2020 - 13:40 CET.
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