Sigaba CSP-2900 machine challenge

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The Sigaba is a revolutionary American electromechanical cipher machine. It was put into service in 1941. It will remain in service until the end of the 1950s.

The CSP-2900 is the second model of the Sigaba. This model was used after the Second World War.

Reference:Sigaba

1st Problem (very easy)

Rafael Pascual 15/02/25

G. Lasry 28/05/25

Jerva 28/09/25

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2nd Problem (very difficult)

G. Lasry 25/05/25

Jerva 05/10/25

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3rd Problem (very hard)

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4th Problem (very hard)

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