TheCodeBreakers
adopted many N.S.A.-designed features.
The second section, STED (for "Standard Technical Equipment
Development") conducts basic cryptographic research. It looks for new
principles of encipherment. It ascertains whether new developments in
technology, such as the transistor and the tunnel diode, have
cryptographic applications. Using such esoteric tools as Galois field
theory, stochastic processes, and group, matrix, and number theory,
________*w».»ui,ai iiiuuci 01 a proposed cipher
machine and will simulate its operation on a computer, thus
producing the cipher without having to build the hardware. Rotor
principles have often been tested for cryptographic strength in this way.
It devises audio scramblers, from the ultra-secure types for high officials
to the walkie-talkies of platoon commanders, as well as video scramblers
for reconnaissance television and for facsimile. Their development
annaabi.ee 
