Hugo Hadwiger - Cryptographic Work

Cryptographic Work

Hadwiger was one of the principal developers of a Swiss rotor machine for encrypting military communications, known as NEMA. The Swiss, fearing that the Germans and Allies could read messages transmitted on their Enigma cipher machines, enhanced the system by using ten rotors instead of five. The system was used by the Swiss army and air force between 1947 and 1992.

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