National Security Agency encryption devices

U-229

The U-229 is a cable connector currently used by the U.S. military for audio connections to field radios, typically for connecting a handset. There are five-pin and six-pin versions, the sixth pin version using the extra pin to power accessories. This type of connector is also used by the National Security Agency to load cryptographic keys into encryption equipment from a fill device. It is specified by the detail specification MIL-DTL-55116D . (Wikipedia).

U-229
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Related pages

Key (cryptography) | Encryption | Fill device