KY-7
Encyclopedia
The KY-7 is a cryptographic device
Cryptography
Cryptography is the practice and study of techniques for secure communication in the presence of third parties...

 which is no longer in use. It was phased out of service prior to the 1990 Gulf War
Gulf War
The Persian Gulf War , commonly referred to as simply the Gulf War, was a war waged by a U.N.-authorized coalition force from 34 nations led by the United States, against Iraq in response to Iraq's invasion and annexation of Kuwait.The war is also known under other names, such as the First Gulf...

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