Tool to decrypt/encrypt with Vigenere multiplication. Vigenere Multiplicative Cipher is a Vigenere variant which uses a key, but replacing an addition by a multiplication.

Vigenere Multiplicative Cipher - dCode

Tag(s) : Poly-Alphabetic Cipher

dCode is free and its tools are a valuable help in games, maths, geocaching, puzzles and problems to solve every day!

A suggestion ? a feedback ? a bug ? an idea ? *Write to dCode*!

Sponsored ads

Tool to decrypt/encrypt with Vigenere multiplication. Vigenere Multiplicative Cipher is a Vigenere variant which uses a key, but replacing an addition by a multiplication.

Vigenere Multiplication Encryption uses a numeric key (some numbers) and a numeric message (use a alphanumeric substitution A1Z26, or ASCII code for example).

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

Plain numbers | 4 | 3 | 15 | 4 | 5 |

Key numbers | 11 | 5 | 25 | 11 | 5 |

Cipher numbers | 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.

Vigenere multiplication can be cracked by trying to find the length for which GCD of values are the greatest.

dCode retains ownership of the source code of the script Vigenere Multiplicative Cipher online. Except explicit open source licence (indicated Creative Commons / free), any algorithm, applet, snippet, software (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any function (convert, solve, decrypt, encrypt, decipher, cipher, decode, code, translate) written in any informatic langauge (PHP, Java, C#, Python, Javascript, Matlab, etc.) which dCode owns rights will not be released for free. To download the online Vigenere Multiplicative Cipher script for offline use on PC, iPhone or Android, ask for price quote on contact page !

multiplication,multiplicative,multiply,vigenere,time,factor

Source : https://www.dcode.fr/multiplication-vigenere-cipher

© 2020 dCode — The ultimate 'toolkit' to solve every games / riddles / geocaches. dCode

Feedback

▲