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Wideband Digital Voice Terminal

VINSON is a family of wideband secure voice devices (WBSV), developed in the mid-1970s by or behalf of the US Natio­nal Security Agency (NSA). The devices use 16 Kbit/s CVSD audio compres­sion 1 and the NSA Suite A Type 1 SAVILLE encryption algorithm. VINSON replaces the NESTOR de­vices from the Vietnam-era, such as the KY-8 and KY-38. VINSON devices provide tactical secure voice for VHF and UHF line-of-sight (LOS) and SATCOM radio equipment, and for tactical tele­phone systems. When unkeyed, VINSON devices are unclassified Controlled Cryptographic Items (CCI). Whe keyed, they assume the classification level of the provided KEY material.

VINSON was in produc­tion until 1993, after which the devices were gradually replaced by ANDVT equipment like KY-99 and KY-100. Nevertheless, the NSA started a modernisation program in 2013, to provide drop-in replacements for KY-57 and KY-58, based on modern electronics [2]. The program was known as VINSON/ANDVT Cryptographic Modernization (VACM), and in 2014 the development contract was awarded to Raytheon [3]. This has resulted in the backward compatible KY-57M and KY-58M, which have been in production until at least 2021 [4].

  1. Fascinator uses CVSD at 12 Kbit/s. Some KY-57 units were modified for interoperability with Fascinator.

VINSON devices
TSEC/KYV-2(A) VINSON unit for PRC-68 radio
KY-57 (VINSON) Wide-band secure voice terminal
Airborne version of KY-57
KY-67 (BANCROFT) integrated PRC-77 radio and KY-57 voice encryptor
Fascinator, VINSON module for Motorola Saber two-way radio
SINCGARS ICOM compatible radios
Related equipment
KY-99 (MINTERM) Narrow-band Voice and Data Terminal
AN/KOI-18 Key Tape Reader
AN/KYK-13 Key Transfer Device
AN/CYZ-10 Data Transfer Device
Wireline adapter HYX-57
RT-1439 non-ICOM radio set
Digital Subscriber Voice Terminal
Embeddable COMSEC module
Advanced INFOSEC Machine II
  1. CSESD-11
    Communications Security Equipment System Document for Fill Devices

    NSA, date unknown. Unclassified parts only. #CM303091/B.

  2. CSESD-14
    Communications Security Equipment System Document for TSEC/KY-57/58

    NSA, July 1984. Unclassified parts only. #CM303091/C.

  3. VINSON equipment test procedure
    Applicable to KY-57, HYX-57, HYP-57 and KY-58.
    NSA, date unknown. Unclassified parts only. #CM303091/E.
  1. Wikipedia, VINSON
    Visited 19 April 2024.

  2. GovTribe, VINSON/ANDVT Cryptographic Modernization (VACM) Production
    24 April 2013.

  3. GovTribe, VACM Notice of Proposed Contract Action
    20 August 2014.

  4. John Keller, Raytheon to provide cyber security and
    cryptographic capability for secure voice communications

    Military+Aerospace Electronics, 20 December 2016.
Further information
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Crypto Museum. Created: Friday 19 April 2024. Last changed: Thursday, 02 May 2024 - 06:38 CET.
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