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Crypto NSA DS-101 → DS-102 →
Electronic transfer devices
A key transfer device is an electronic device that is used (most commonly
by the military) for the distribution of cryptographic variables, such as
crypto keys and frequency hopping tables.
Key fillers often use a standard data protocol,
such as DS-102
or DS-101 — both endorsed by the
US National Security Agency (NSA) —
but devices with proprietary protocols are also common.
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FILL devices are known under different names:
- Electronic Transfer Device
- Key Transfer Device
- Key Fill Device (KFD)
- Common Fill Device (CFD)
- Data Transfer Device (DTD)
- Key Fill Gun
- Key Filler
- Key Loader
- Fill Device
- Fill Gun
- Filler
- FILL
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Fill devices on this website
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Key fillers are commonly used for the distribution of the
Transmission Encryption Keys (TEK)
and Transmission Security Keys (TSK),
such as Frequency Hopping (FH) tables.
The latter is also known as Electronic Counter Counter-Measures (ECCM).
Fill devices are also used for the distribution of Key Encryption Keys (KEK).
Fill devices are used for:
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- Crypto keys
- FH (Frequency Hopping) tables
- GPS (Global Positioning System) keys
- IFF (Identification Friend or Foe)
- Software updates
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Below is a non-exhaustive list of known transfer devices:
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Most devices that support the NSA's
DS-101
or DS-102 protocol, use the
same 5-pin or 6-pin AUDIO connector, commonly referred to as U-229/U
or simply U-229.
It has a standard pinout,
but is different for each protocol. Click the
image below for more information. ➤ More
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- DS-101
This is the most recent transfer protocol that is used with the
current generation of FILL devices, radio sets and encryption equipment.
It superceedes DS-102 and can be used for transferring crypto keys,
frequency hopping data, software updates, etc.
➤ More
- DS-102
This is a synchronous serial protocol that was used with the first
generation of Key Fill Devices, such as the KYK-13.
It is the predecessor of the DS-101 protocol, and
can be used for the distribution of key material and frequency hopping
tables.
➤ More
- C-200
This is a proprietary protocol used by Siemens for its
MSC-2001 voice encryption unit
and the CHX-200 radio system.
It is supported by the Siemens Fill Gun
and is fully described in the technical manual of the MSC-2001.
➤ More
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© Crypto Museum. Last changed: Monday, 29 April 2024 - 09:19 CET.
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