KIV-7

The KIV-7 is a National Security Agency Type-1, single-channel encryptor originally designed in the mid-1990s by AlliedSignal Corporation to meet the demand for secure data communications from personal computers (PC), workstations, and FAXs. It has data rates up to 512 kbit/s and is interoperable with the KG-84, KG-84A, and KG-84C data encryption devices.

Several versions of the KIV-7 have been developed over the years by many different corporations that have either bought the rights to build the KIV-7 or through corporate mergers.

(The National Security Agency (NSA) has established new High Assurance Internet Protocol Interoperability Specifications (HAIPIS) that requires different vendor's Inline Network Encryption (INE) devices to be interoperable.)

...
Wikipedia