Cabinet Noir
>Encrypt / Vigènere cipher
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Each letter of the message is shifted by the matching letter of a repeating key.
Type
polyalphabetic substitution cipher
Breaking it
hard to break by hand
Era
16th century
Name
Described by Giovan Battista Bellaso in 1553, later misattributed to Blaise de Vigenère.
Modes
encrypt · decrypt · cryptoanalysis
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Tool
Cryptoanalysis
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History
Practice
Message
i
Key
i
Alphabet
i
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Created by Denys Grybov in 2021
v.0.4.0 // released on 18.10.2026