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KLL-1
Key tape reader

KLL-1 is a key tape reader for a key transfer device, developed by ANT in Backnang (Germany). It was used by the armies of Germany and other NATO countries for loading cryptographic material, also known as Transmission Encryption Keys (TEKs), into crypto equipment and transfer devices. The device supports the DS-102 protocol, developed by the US National Security Agency (NSA).

The device is housed in a military green die-cast aluminium enclosure that measures 135 x 64 x 38 mm and weights 342 grams (without battery).

Contrary to other key loading equipment, such as the KYK-13 and the KSP-1, the KLL-1 does not have an internal static memory to hold the key, but transfers it directly from 8-level 1 paper tape to a crypto device (or a key transfer device), just like the USA's KOI-18 of which it is a clone. A key tape is entered into the tape reader that is located under a hinged lid, and should be pulled through the reader manually at regular speed.
  
KLL-1 with open lid

The device is SAVILLE-compatible, which means that it can be used with all crypto equipment and key transfer devices that can handle the 128-bit 2 keys used by speech encryption devices that feature the SAVILLE algorithm, such as the KY-57, KY-99, Spendex 40 and the Elcrovox 1-4. Such devices generally uses the DS-102 protocol in combination with a standard 6-pin U-229 socket and a 1:1 transfer cable, for transferring the keys. When unloaded, the DLL-1 is unclassified [4]. Apart from ANT, the DLL-1 was also available under the Siemens, Rohde & Schwarz and other brand names. The device is also known by its National Stock Number NSN 5810-12-314-6484.

  1. 8-bit ASCII data format, also known as IA No. 5 or ITA No. 5.  More
  2. SAVILLE is a secret cryptographic algorithm, that was jointly developed by GCHQ and the NSA. It uses an 120 bit secret KEY, with an 8-bit checksum.  More

KLL-1 KLL-1 KLL-1 with open lid KLL-1 with open lid U-229 socket Holding a KLL-1 in the hand Battery compartment 1:1 transfer cable
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KLL-1
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KLL-1
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KLL-1 with open lid
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KLL-1 with open lid
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U-229 socket
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Holding a KLL-1 in the hand
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Battery compartment
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1:1 transfer cable

Interior
The interior of the DLL-1 can be reached by removing four large bolts from the corners of the top panel, after which the top panel can be removed. The electronics are mounted on a single PCB that is mounted to the rear of the top panel. The case shell only holds the 6-pin U-229 socket.

The image on the right shows the PCB mounted to the rear of the top panel. The white section at the center of the PCB, is the actual tape reader, that consists of eight thin spring contacts. Apart from a single 20-pin custom LSI 1 chip, the PCB does not contain any active components.

The board has two connectors: one for the 3.6V battery and one for the wiring to the U-229 socket. In the image, the battery is connected (via the red and black wires), whilst the U-229 wiring has been removed. Note that the device does not contain any memory for key storage.
  
Electronics mounted to the rear of the top panel

The battery is only used for powering the circuit (i.e. the custom chip). The device is activated automatically when a tape is entered into the reader. The clock pulses for the DS-102 transfer protocol are generated by the holes in the key tape when pulling the tape through.

  1. LSI = Large Scale Integration.

Interior Electronics mounted to the rear of the top panel Close-up of the custom chip
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Interior
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Electronics mounted to the rear of the top panel
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Close-up of the custom chip

Branding
The KLL-1 was marketed by the following companies:

Connection
Below is the pinout of the U-229 socket. For a more detailed description, check  this page.

  1. GND
  2. not connected
  3. ACK
  4. DATA
  5. CLK
  6. not connected
References
  1. Fill Devices KLL1, KEV1, KSP1
    ZfCh 7049 E. NATO RESTRICTED.

  2. Siemens, Encryption Equipments from Siemens
    Brochure, 1991. p. 8.

  3. Rohde & Schwarz, KLL1 Key Tape Reader and KSP1 Key Transfer Device
    Product leaflet, version 01.00, November 2006.

  4. Defensie Materieel Organisatie, Controlled Cryptographic / Comset Items (CCI's)
    NC 023005. Dutch Department of Defence. RESTRICTED.
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Crypto Museum. Created: Sunday 03 September 2017. Last changed: Monday, 04 September 2017 - 07:17 CET.
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