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1
Club Charts Top30 25.06.2014 (KW26) by Chartsx3 (Juni 2014)
Club Charts Top30 25.06.2014 (KW26) by Chartsx3 (Juni 2014)
::2014/06/25::
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2
Electro/Progressive House - Charts Top 25 (KW 26 2014) [27.06.2014 - 04.07.2014]
Electro/Progressive House - Charts Top 25 (KW 26 2014) [27.06.2014 - 04.07.2014]
::2014/06/27::
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3
RTV Sportarena KW 26
RTV Sportarena KW 26
::2014/06/24::
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4
Lavor KW 26 - смываем колпак.mp4
Lavor KW 26 - смываем колпак.mp4
::2010/06/04::
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5
MEMA TV - KW 26 - Panorama
MEMA TV - KW 26 - Panorama
::2014/06/26::
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6
Proj. LEONDING HStWg | 14-KW 26 | Bestandsaufnahme
Proj. LEONDING HStWg | 14-KW 26 | Bestandsaufnahme
::2014/06/28::
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7
MEF kompakt 2014 kw26
MEF kompakt 2014 kw26
::2014/06/26::
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8
"Wir in Esslingen KW 26"
"Wir in Esslingen KW 26"
::2014/07/07::
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9
KW26- Hickel: Made im Murtal Haus
KW26- Hickel: Made im Murtal Haus
::2012/06/22::
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10
Eteos-Nachrichten 2014 KW 26 - Aktuelles aus Gesellschaft, Kirche und Politik
Eteos-Nachrichten 2014 KW 26 - Aktuelles aus Gesellschaft, Kirche und Politik
::2014/06/27::
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11
Wettervorschau KW 26
Wettervorschau KW 26
::2014/06/26::
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12
Apps der Woche #002 KW 26/2014 | CocasBlog.de
Apps der Woche #002 KW 26/2014 | CocasBlog.de
::2014/06/28::
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13
FIFA 13 - Tore der Woche - KW 26
FIFA 13 - Tore der Woche - KW 26
::2013/06/29::
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14
Kinotipps KW 26 Beste Mädelsabend aufm Sauacker
Kinotipps KW 26 Beste Mädelsabend aufm Sauacker
::2014/06/24::
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15
Meine Woche mit Büchern - KW 26
Meine Woche mit Büchern - KW 26
::2014/06/28::
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Angst um Bezahlung, Weitere Entlassung, Stephanie befördert [WWE NEWS - KW 26/2014]
Angst um Bezahlung, Weitere Entlassung, Stephanie befördert [WWE NEWS - KW 26/2014]
::2014/07/01::
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myREGIO.TV - MAGAZIN: Sendung der KW 26/27 - 2014
myREGIO.TV - MAGAZIN: Sendung der KW 26/27 - 2014
::2014/06/21::
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18
MEMA TV - KW 26 - Landesfeuerwehrtag in Krieglach
MEMA TV - KW 26 - Landesfeuerwehrtag in Krieglach
::2014/06/26::
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19
Techniknews #KW26 2014 [72] R9 295x, iPhone 6, CPU´s aus Russland
Techniknews #KW26 2014 [72] R9 295x, iPhone 6, CPU´s aus Russland
::2014/06/28::
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20
KW 26-2014 Die Börse in 100 Sekunden
KW 26-2014 Die Börse in 100 Sekunden
::2014/06/23::
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21
AMD Comeback | PNY GTX | BeQuiet überflüssig? - TECHTREND #6 KW26
AMD Comeback | PNY GTX | BeQuiet überflüssig? - TECHTREND #6 KW26
::2014/06/30::
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22
Ländle TV Wochenhighlights KW 26
Ländle TV Wochenhighlights KW 26
::2014/06/28::
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23
MEMA TV - KW 26 - Lieder gehen um die Welt in St.Lorenzen im Mürztal
MEMA TV - KW 26 - Lieder gehen um die Welt in St.Lorenzen im Mürztal
::2014/06/26::
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Proj. LEONDING GbStr | 14-KW 26 | OG Decke+Balkon-Wände-01
Proj. LEONDING GbStr | 14-KW 26 | OG Decke+Balkon-Wände-01
::2014/06/27::
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25
Die Ländle TV Fussballshow KW 26/2014
Die Ländle TV Fussballshow KW 26/2014
::2014/06/17::
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26
MEMA TV - KW 26 - 20 Jahre Buschenschank Lärchegg-Schmölzer in Stiwoll
MEMA TV - KW 26 - 20 Jahre Buschenschank Lärchegg-Schmölzer in Stiwoll
::2014/06/26::
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27
LT Tipp KW26 2013
LT Tipp KW26 2013
::2013/07/22::
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28
MEMA TV - KW 26 - Jubiläum der Mürztaler
MEMA TV - KW 26 - Jubiläum der Mürztaler
::2014/06/26::
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29
katholisch1.tv - das Magazin vom 29.06.2014 (KW 26/2014)
katholisch1.tv - das Magazin vom 29.06.2014 (KW 26/2014)
::2014/06/30::
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30
WTV KW 26
WTV KW 26
::2014/06/26::
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31
Bericht RTV Aktuell KW 26 Dienstag 2014
Bericht RTV Aktuell KW 26 Dienstag 2014
::2014/06/25::
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32
ENERGY VLOG S3/E5/KW26 SPECIAL "ENERGY in the Park 2012" Teil 2
ENERGY VLOG S3/E5/KW26 SPECIAL "ENERGY in the Park 2012" Teil 2
::2012/07/05::
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33
DVS-TV Nachrichtensendung 14-26 - KW 26/27
DVS-TV Nachrichtensendung 14-26 - KW 26/27
::2014/06/24::
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34
Dannys Woche - KW 26/2014
Dannys Woche - KW 26/2014
::2014/06/30::
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35
HiWay-TV Sendung KW26 2014
HiWay-TV Sendung KW26 2014
::2014/06/26::
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36
ENERGY VLOG S3/E4/KW26 SPECIAL "ENERGY in the Park 2012" Teil 1
ENERGY VLOG S3/E4/KW26 SPECIAL "ENERGY in the Park 2012" Teil 1
::2012/07/02::
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37
Techniknews #KW26 2013 [11] GTX 760, DirectX 11.2, Apple und TSMC, AMD vs Nvidia
Techniknews #KW26 2013 [11] GTX 760, DirectX 11.2, Apple und TSMC, AMD vs Nvidia
::2013/06/29::
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38
LTV Wochenmagazin KW 26/2014
LTV Wochenmagazin KW 26/2014
::2014/06/24::
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39
myREGIO.TV - Sendung der KW 26/27
myREGIO.TV - Sendung der KW 26/27
::2013/06/22::
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40
Bericht RTV Aktuell KW 26 Mittwoch 2014
Bericht RTV Aktuell KW 26 Mittwoch 2014
::2014/06/26::
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41
2014 KW 26: Immobilien AGs emittieren Wandel-anleihen
2014 KW 26: Immobilien AGs emittieren Wandel-anleihen
::2014/06/23::
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42
Electro/Progressive House - Charts Top 20 (KW 26 2013) [28.06.2013] - [05.07.2013]
Electro/Progressive House - Charts Top 20 (KW 26 2013) [28.06.2013] - [05.07.2013]
::2013/06/28::
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43
MEMA TV - KW 26 - Tourismusplus in Bruck
MEMA TV - KW 26 - Tourismusplus in Bruck
::2014/06/26::
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44
MEMA TV - KW 26 - Spatenstich SHV Krieglach
MEMA TV - KW 26 - Spatenstich SHV Krieglach
::2014/06/26::
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45
MEMA TV - KW 26 - Leichtathletiktag der Volksschulen in Kapfenberg
MEMA TV - KW 26 - Leichtathletiktag der Volksschulen in Kapfenberg
::2014/06/26::
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46
Tipps der Woche - KW 26 - nrwision
Tipps der Woche - KW 26 - nrwision
::2014/06/23::
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47
ISW-Journal KW 26
ISW-Journal KW 26
::2014/07/03::
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48
Wollmilchsau - Wochenrückblick KW 26 - von Google+ und Facebook bis Delingsdorf
Wollmilchsau - Wochenrückblick KW 26 - von Google+ und Facebook bis Delingsdorf
::2011/07/02::
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49
2014 KW26 DiasporaTV
2014 KW26 DiasporaTV
::2014/06/27::
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KW26 Frauenberatung
KW26 Frauenberatung
::2011/07/01::
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RESULTS [51 .. 101]
From Wikipedia, the free encyclopedia
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An array of KW-26s

The TSEC/KW-26, code named ROMULUS,(in 1966 the machine based encryption system was not code-named "Romulus, rather the code-name was Orion, at least in the US Army's variant) was an encryption system used by the U.S. Government and, later, by NATO countries. It was developed in the 1950s by the National Security Agency (NSA) to secure fixed teleprinter circuits that operated 24 hours a day. It used vacuum tubes and magnetic core logic, replacing older systems, like SIGABA and the British 5-UCO, that used rotors and electromechanical relays.

A KW-26 system (transmitter or receiver) contained over 800 cores and approximately 50 vacuum-tube driver circuits, occupying slightly more than one half of a standard 19-inch rack. Most of the space in the rack and most of the 1 kW input power were required for the special-purpose vacuum tube circuits needed to provide compatibility with multiple input and output circuit configurations. The military services' requirements for numerous modes and speeds significantly increased costs and delayed delivery. NSA says it is doubtful that more than three or four of the possible configurations were ever used.

The KW-26 used an NSA-developed encryption algorithm based on shift registers. The algorithm produced a continuous stream of bits that were xored with the five bit Baudot teleprinter code to produce ciphertext on the transmitting end and plaintext on the receiving end. In NSA terminology, this stream of bits is called the key. The information needed to initialize the algorithm, what most cryptographers today would call the key, NSA calls a cryptovariable. Typically each KW-26 was given a new cryptovariable once a day.

KW-26 model C; the receiver is at the top, the transmitter at the bottom. Card reader is in upper right of each unit.

NSA designed a common fill device (CFD), for loading the cryptovariable. It used a Remington Rand (UNIVAC) format punched card (45 columns, round holes). The operator inserted the daily key card into the CFD and closed the door securely, locking the card in place. Decks of cards were created by NSA and sent by courier. The cards were strictly accounted for.

Because the KW-26 used a stream cipher, if the same key card was ever used twice, the encryption could be broken. To prevent re-use, the card was automatically cut in half upon reopening the CFD. As the units aged, the card reader contacts became less dependable, and operators resorted to various tricks, such as hitting the card reader cover with a screwdriver, to get them to work properly. Card readers were cleaned and the spring loading of the contacts checked as part of the routine maintenance of the device.

Because the KW-26 sent a continuous stream of bits, it offered traffic-flow security. Someone intercepting the ciphertext stream had no way to judge how many real messages were being sent, making traffic analysis impossible. One problem with the KW-26 was the need to keep the receiver and transmitter units synchronized. The crystal controlled clock in the KW-26 was capable of keeping both ends of the circuit in sync for many hours, even when physical contact was lost between the sending and receiving units. This capability made the KW-26 ideally suited for use on unreliable HF radio circuits. However, when the units did get out of sync, a new key card had to be inserted at each end. The benefit of traffic-flow security was lost each time new cards were inserted. In practice, operational protocol led to the cards being replaced more often than was desirable to maintain maximum security of the circuit. This was especially so on radio circuits, where operators often changed the cards many times each day in response to a loss of radio connectivity. In any case, it was necessary to change the cards at least once per day to prevent the cypher pattern from repeating.

Early KW-26 units protected the CRITICOMM network, used to protect communications circuits used to coordinate signals intelligence gathering. The initial production order for this application, awarded to Burroughs in 1957, was for 1500 units. Other services demanded KW-26's and some 14000 units were eventually built, beginning in the early 1960s, for the U.S. Navy, Army, Air Force, Defense Communications Agency, State Department and the CIA. It was provided to U.S. allies as well.

When the USS Pueblo was captured by North Korea in 1968, KW-26's were on board. In response, the NSA had modifications made to other units in the field, presumably changing the crypto algorithm in some way, perhaps by changing the shift register feedback taps. Starting in the mid-1980s, the KW-26 system was decommissioned by NSA, being replaced by the more advanced solid-state data encryptor, TSEC/KG-84.

See also[edit]

External links[edit]

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