Ralph Simpson was speaker of the month at the California Historical Radio Society where he gave a talk on the early development of encryption devices. He focused on the Enigma cipher machine, its inventors and patents, and its use by the German military during the Second World War. He also explains why the machine was considered unbreakable, but eventually proved to be the Achilles' heel of the German armed forces during the Second World War.
Ralph had a career in the computer industry but also developed a passion for old cipher machines and their history. He is a respected member of the cryptologic history community and runs a website with a wealth of historical crypto devices and equipment for secret communications, all accompanied by technical details and relevant historical information. Be sure to visit his website Cipher History.
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