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KG-13
The KG-13 was the first transistorized cryptographic machine developed by NSA in the early 60's. It used the newly developed 2N404 germanium transistor instead of vacuum tubes. It consisted of a KG-3 transmitter a KG-12 receiver. The transmitter used about 500 transistors and the receiver about 300. The transmitter was switchable to function as a receiver.〔(KG-13 (PONTUS) )〕
==KG-13 (PONTUS) ==
The KG-13 Electronic Key Generator, Transmitter/Receiver was similar in appearance to the KG-14. This solid state design dating from the mid-to-late 1960s, originally cost $13,000 per copy. It was one of the first crypto machines to encrypt data such as facsimile. Crypto technicians received 10 to 12 weeks training on the machine. The KG-13 was composed of a KG-3 transmitter and a KG-12 receiver.
A KG-13 unit. One drawer bears the designation KGD-3/TSEC. The total weight is around 250 pounds. The KG-13 was controlled by "key cards". These were IBM-like punch cards that determined the starting point of the KG-13 encryption which was done by "koken stages". The key cards were changed daily at HJ time. When the USS Pueblo, with a KG-13 aboard, was captured by the North Koreans in 1968, the personnel didn't have time to destroy it. As a result, a working model of the KG-13 fell into enemy hands. NSA quickly designed a modification to the koken stage board to alter its operation in order that the enemy didn't have an identical working model.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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