NSA Suite A Cryptography is NSA cryptography which "contains classified algorithms that will not be released". "Suite A will be used for the protection of some categories of especially sensitive information (a small percentage of the overall national security-related information assurance market)."
+Incomplete list of Suite A algorithms Name Type Purpose ACCORDION Encryption Key encryption. In NGLD-M (circa 2019): Chapters cited include: 3.2.7.1 (U) Algorithms on page 42 (page 48 of PDF file) 1.3 is used for TrKEK (transfer key encryption key) and internal key wrap 3.0 internal key wrap and KMI Black key wrap BATON Block cipher See article CDL 1, CDL 2 ? ? FFC ? ? FIREFLY and Enhanced FIREFLY Key exchange ? JOSEKI ? ? KEESEE ? ? KM-TG Series Signature In NGLD-M: Security-related software MAYFLY ? ? MEDLEY Symmetric encryption In NGLD-M: Data at Rest (DAR) and non-crypto software MERCATOR ? ? SAVILLE Encryption (1960s) Voice and data over radio, see article SHILLELAGH ? ? SILVER LINING Signature In NGLD-M: Security-related software SPONDULIX-S Key Agreement In NGLD-M: KMI WALBURN ? ? WATARI Encryption In NGLD-M: Security-related software WEASEL ? ?
See also Commercial National Security Algorithm Suite NSA Suite B Cryptography
References
General NSA Suite B Cryptography / Cryptographic Interoperability