APCO Project 25 (single-channel land mobile radios) (Saville has algorithm ID 04)

The VINSON family (voice encryption)

Versatile encryption chips: AIM, Cypris, Sierra I/II, Windster, Indictor, Presidio, Railman

SAVILLE is an NSA Type 1 encryption algorithm. It is used broadly, often for voice encryption, and implemented in a large number of encryption devices. Little is known publicly about the algorithm itself. Some documentation related to the KYK-13 fill device and statements made by military officials suggest that SAVILLE has a 128-bit key. On the AIM microchip, it runs at 4% of the clock rate (compare DES at 76% and BATON at 129%). The Cypris chip mentions 2 modes; specifications for Windster and Indictor specify that they provide Saville I. Some devices and protocols that implement SAVILLE: