SAVILLE is a classified NSAType 1encryption 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 due to its classified nature and inclusion in the NSA's Suite A. Some documentation related to the KYK-13fill device and statements made by military officials suggest that SAVILLE has a 128-bit key. On the AIMmicrochip, 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: