Explore the secret history of SIGSALY, the WWII tech marvel that secured Allied communications. Discover how a small bunker room in Whitehall connected Churchill with Roosevelt, revolutionizing ...

Sigsaly, or the Green Hornet, was a communications device using spread spectrum and a form of PCM for ultra secret communication during the war. The "key" was contained on a 78 rev/min record ...

SIGSALY used a less efficient analysis/synthesis method similar to a Vocoder, which divides the analog speech into bands and digitizes each band.

SIGSALY was seriously Top Secret in the day, and most of the documentation was destroyed when the system was decommissioned. Working from scant information, [Jon] ...

In a Q&A, Scientific Conversion and Crypto-Museum founder Jon D. Paul previews his Saturday morning NAB BEITC session, The Origins of Our Digital Universe, which he characterizes as interesting but ...

Sigsaly, or the Green Hornet, was a communications device using spread spectrum and a form of PCM for ultra secret communication during the war. The "key" was contained on a 78 rev/min record ...