B-21 cipher machine challenge

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The B-21 encryption machine was developed in the 1925 by Boris Hagelin. The machine was used by several companies and armies.

Reference: Hagelin B-21 and B-211

Problems (notes)

1st Problem (very easy)

Luigi Tomelli 31/12/18

Rafael Pascual 15/04/21

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2nd Problem (easy)

Luigi Tomelli 31/12/18

Rafael Pascual 21/04/21

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3rd Problem (medium)

Luigi Tomelli 31/12/18

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4th Problem (medium)

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5th Problem (medium)

G. Lasry 19/01/18

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6th Problem (medium)

G. Lasry 19/01/18

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7th Problem (medium)

G. Lasry 19/01/18

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8th Problem (hard)

G. Lasry 19/01/18

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