KOI-18: Difference between revisions

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{{Short description|Handheld paper tape reader}}

[[Image:KOI-18.nsa.jpg|thumb|300px|A KOI-18 on display at the [[National Cryptologic Museum]].]]

The '''KOI-18''' is a hand-held [[paper tape]] reader developed by the U.S. [[National Security Agency]] as a [[fill device]] for loading [[key (cryptography)|cryptographic keys]], or "crypto variables," into security devices, such as [[encryption]] systems. It can read 8-level paper or [[PET film (biaxially oriented)|PET]] tape, which is manually pulled through the reader slot by the operator. It is battery powered and has no internal storage, so it can load keys of different lengths, including the 128-bit keys used by more modern systems. The KOI-18 can also be used to load keys into other fill devices that do have internal storage, such as the [[KYK-13]] and [[AN/CYZ-10]]. The KOI-18 only supports the DS-102 interface.

A similar device was developed by Prof. [[Jean-Daniel Nicoud]] for the [[Smaky]] 4 in 1975.<ref>[http://www.computerhistory.org/core/backissues/pdf/core_3_1.pdf CORE 3.1, Computer History Museum, February 2002] {{webarchive|url=https://web.archive.org/web/20130103023359/http://www.computerhistory.org/core/backissues/pdf/core_3_1.pdf |date=2013-01-03 }}</ref><ref>[http://www.smaky.ch/chapitre.php?id=lami_4 Smaky.ch]</ref>

==References==

{{reflist}}

* {{US patent reference

|number = 6859537

|inventor = Houlberg, Christian L.; Borgen, Gary S.

|title = Non-volatile memory for use with an encryption device

|y = 2005

|m = 02

|d = 22

}}

==External links==

*[http://jproc.ca/crypto/koi18.html KOI-18 diagram]

[[Category:Key management]]

[[Category:National Security Agency encryption devices]]

{{crypto-stub}}