National Security Agency encryption devices

chipset that was developed and promoted by the NSA

thumb|A SINCGARS is being operated from within a HMMWV. Single Channel Ground and Airborne Radio System (SINCGARS) is a VHF combat-net radio (CNR) used by U.S. and allied military forces. In the CNR network, the SINCGARS' primary role is voice transmission between surface and airborne command and control (C2) assets.

The DRYAD Numeral Cipher/Authentication System (KTC 1400 D) is a simple, paper cryptographic system employed by the U.S. military for authentication and for encryption of short, numerical messages. Each unit with a radio is given a set of matching DRYAD code sheets. A single sheet is valid for a limited time (e.g. 6 hours), called a cryptoperiod.

The TSEC/KL-7, also known as Adonis was an off-line non-reciprocal rotor encryption machine. The KL-7 had rotors to encrypt the text, most of which moved in a complex pattern, controlled by notched rings. The non-moving rotor was fourth from the left of the stack. The KL-7 also encrypted the message indicator.