The vast majority of the National Security Agency's work on encryption is classified, but from time to time NSA participates in standards processes or otherwise publishes information about its cryptographic algorithms. The following is a brief and incomplete summary of public knowledge about NSA algorithms and protocols.
See also NSA encryption systems.
| Name
| Type
| Specification
| Use
| Equipment (incomplete list)
|
| ACCORDIAN (or ACCORDION)
|
| R21-TECH-13-00, "ACCORDIAN 3.0 Specification" (August 2000)
|
| AIM (1999 and 2004 brochures), SafeXcel-3340
|
| BATON
| Block cipher
|
| Various
| PKCS #11, CDSA/CSSM, AIM (1999 and 2004 brochures), Cypris, APCO Project 25, MYK-85, Fortezza Plus, SecNet-11, Sierra, SafeXcel-3340
|
| BAYLESS
|
|
|
| Cypris
|
| BYTEMAN
|
|
|
| Cypris
|
| CARDIGAN
|
|
|
| Cypris
|
| CARDHOLDER
|
|
| Satellite uplink command encryption
| Cypris, KI-17, U-AYJ Flight Decrypt Chip (Cardholder), Flight Encrypt Chip (Cardholder), MYK-16, CXS-810, CXS-2000, MCU-100, MCU-600
|
| CARIBOU
|
|
| Satellite uplink command encryption
| U-TXZ, MYK-15A
|
| CRAYON
|
|
|
| AIM (2004 brochure), Cypris (4 modes)
|
| FASTHASH
| Cryptographic hash function
|
| MISSI Type 1 hash
| PKCS #11, CDSA/CSSM
|
| FIREFLY
|
|
| EKMS public-key cooperative key generation
| AIM (2004), SafeXcel-3340
|
| HAVE QUICK
|
|
| Antijam, LPI/LPD airborne voice communication
| Cypris
|
| JACKNIFE
|
|
|
| AIM (2004)
|
| JOSEKI
|
| R21-TECH-0062-92, "JOSEKI-1, A Bootstrap Procedures" (Oct. 1992) (also R21-TECH-13-97, R21-TECH-13-98)
| Protection of secret algorithms in firmware
| AIM
|
| JUNIPER
| Block cipher
|
|
| PKCS #11, CDSA/CSSM
|
| KEESEE
|
|
|
| AIM (1999 and 2004 brochures), Cypris
|
| Mark XII IFF
|
|
| IFF secondary radar
| AIM (2004 brochure)
|
| MAYFLY
| Asymmetric-key algorithm
|
|
| PKCS #11, CDSA/CSSM
|
| MEDLEY
|
| R21-TECH-30-01, "MEDLEY Implementation Standard" (Nov. 2001)
|
| AIM (2004), SecNet 54, SafeXcel-3340
|
| PEGASUS
|
|
| Satellite telemetry and mission data downlinks
| KG-227, KG-228, KI-17, U-BLW Pegasus Space Microcircuit Chip, U-BLX Pegasus Ground Microcircuit Chip, MYK-17, CXS-810, CXS-2000, MCU-100, MCU-600
|
| PHALANX
|
|
|
| AIM (1999 and 2004 brochures), Cypris (PHALANX I and PHALANX II)
|
| SAVILLE
|
|
| Low-bandwidth voice (and sometimes data) encryption
| AIM (1999 and 2004 brochures), Cypris (2 modes), Windster (SAVILLE I), VINSON
|
| VALLOR
|
|
| TTY broadcasts to submarines
| AIM (2004)
|
| WALBURN
|
|
| High-bandwidth link encryption
| AIM (2004), KG-81/94/194/95
|
| PADSTONE
|
|
|
| Cypris (2 modes), Windster, Indictor
|
| WEASEL
|
|
|
| SafeXcel-3340
|
| Name
| Type
| Specification
| Use
| Equipment (incomplete list)
|
| CORDOBA
|
|
|
| Cypris, Windster, Indictor
|
| KEA
| Asymmetric-key algorithm
| R21-Tech-23-94, "Key Exchange Algorithm (KEA)"
| Key exchange and digital signature algorithm for Fortezza, etc.
| Fortezza, Fortezza Plus, Palladium Secure Modem
|
| SKIPJACK
| Block cipher
| R21-Tech-044-91, "SKIPJACK"
| Confidentiality algorithm for Fortezza, etc.
| Fortezza, Fortezza Plus, Palladium Secure Modem
|
(Essentially by definition, there are no NSA-developed Type 4 algorithms.)
|
