SZ40 cipher machine challenge

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The Lorenz SZ40 is a cipher machine used by the German Army during World War II. It was built by Lorenz company. In fact, the SZ40 isn't a true cipher machine but an cipher attachment to a teleprinter. As the T52, it uses the Baudot code to transmit cipher or plain text. The British cryptnalysts named it Tunny and were able to decrypt its traffic by means of Colossus, the first electronic computer.

Reference: Crypto Museum - Lorenz SZ-40/42

Problems (notes)

1st Problem (very easy)

G. Lasry 31/12/19

Rafael Pascual 11/07/21

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2nd Problem (difficult)

G. Lasry 29/12/19

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3rd Problem (medium)

G. Lasry 28/12/19

Rafael Pascual 15/09/24

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4th Problem (difficult)

G. Lasry 28/12/19

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5th Problem (medium)

G. Lasry 30/12/19

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6th Problem (Hard)

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7th Problem (Hard)

G. Lasry 01/01/20

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8th Problem (Hard)

G. Lasry 01/01/20

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