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Crypto USA FILL DS-102 KYK-13 →
The device is housed in a rugged green die-cast aluminium enclosure that
measures 130 x 64 x 38 mm and weights 350 gram, battery included. It has a
male U-229 socket
for connection to a host device — either directly or via a
fill cable.
At the front is a hinged lid, below which an 8-bit reader is located, that
accepts 8-bit ASCII format punched paper tape, which is
pulled through the reader manually.
The logic OR of the bits is used to generate the clock pulse.
Each character represents 4 key bits (1 nibble).
The host device will signal whether the transfer was successful.
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As the device does not contain memory, it can not hold any cryptographic keys
and, hence, can not be used as a key fill device. Instead it should be used
to transfer a key directly from tape into a
cryptographic device or
to transfer the key from tape to a
regular key fill device like the
KYK-13 or the
KSP-1.
The KOI-18 is equivalent to the KLL-1,
made by the German manufacturer ANT.
In comparison to other DS-102 devices, its
main advantage is its virtually unlimited key length.
KOI-18 devices were gradually phased out in the 2000s, although in some
countries they were used as late as 2010. The device has
now become obsolete, as production of the blank key tapes has stopped
and existing stocks have been used up. Crypto Museum tries to maintain a
decent stock of 8-bit paper tape, so that we can demonstrate the device
in the years to come.
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The image below gives a quick overview of the features of the KOI-18.
The device is powered by a single 6V battery (BA-1372/U or BA-5372/U).
The fill connector should be connected to a compatible device
– a crypto device or another fill device – either
directly or via a fill cable.
Note that there are no controls whatsoever, not even an ON/OFF switch.
The device is powered automatically when a key tape is inserted into
the tape reader and pulled through at a constant speed.
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The KOI-18 is housed in a two-part die-cast aluminium enclosure
that consists of a case shell – which houses the printed circuit
board with the electronics – and
a lid with a rubber sealing to make it water-tight. The lid also
holds the tape reader, which consists of eight sensing switches.
The image above shows the interior of the KOI-18, which can be
accessed by loosenng four bolts at the corners of the lid.
Note that the device does not have a power switch. Instead, it is
enabled as soon as a paper tape is inserted and pulled through
the tape reader with a constant speed.
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At the rear of the KOI-18 is a 6-pin U-229 connector
(actually a U-283/U) marked J1. This connector can be fitted to a
crypto device by means of a fill cable. It can also be connected
directly to the male receptacle of a KYK-13 key transfer device.
Below is the pinout when looking into the receptacle.
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GND Ground MUX From MUX word generator REQ Fill request INFO Fill data IA Fill clock ORF Override
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Device Key tape reader (FILL) Purpose Reading of cryptographic keys from punched paper tape Model KOI-18 Year 1976 Country USA Developer NSA NSN 5810-01-026-9620 Designator ON190315 Classification Unclassified CCI Interface DS-102 Key length Unlimited Checksum 8-bit CRC Backup 6V, BA-1372/U, BA-5372/U Dimensions 130 × 64 × 38 mm Weight 350 g (battery included)
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© Crypto Museum. Created: Sunday 15 September 2019. Last changed: Sunday, 22 June 2025 - 20:43 CET.
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