Tool to decrypt/encrypt with Vigenere multiplication. Vigenere Multiplicative Cipher is a Vigenere variant which uses a key, but replaces an addition by a multiplication.
Vigenere Multiplicative Cipher - dCode
Tag(s) : Poly-Alphabetic Cipher
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Example: Encode 4,3,15,4,5 (for DCODE) with the key 11,5,25 (for KEY)
Take the first number of the message and the first number of the key and multiply them, the result is the product's value. Same for the next numbers of the message and the key.
If the key length is inferior of the text lenght, start over the key.
Example: Calculate 4*11=44, 3*5=15, 15*25=375, 4*11=44, 5*5=25 to get the cipher message 44,15,375,44,25
Decryption requires a key and a numeric text.
Example: The ciphered message is 44,15,375,44,25 and the key 11,5,25 (for KEY)
Divide the first number of the message by the second number of the key. Write the result (which must be integer). Same for the next numbers of the message and the key.
Example: 44/11=4, 15/5=3 etc. The original plain text is 4,3,15,4,5 (DCODE).
The message is made of numbers with 1 to 5 digits, none is prime.