NSA Suite A Cryptography
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."
| Name | Type | Purpose |
| ACCORDION | Encryption | Key encryption. In NGLD-M : |
| 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 and non-crypto software |
| MERCATOR | ? | ? |
| SAVILLE | Encryption | 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 | ? | ? |