Tool to decrypt/encrypt with Vigenere multiplication. Vigenere Multiplication Cipher is a Vigenere variant which uses a key, but instead of making an addition, it's a multiplication.

Vigenere Multiplication Cipher - dCode

Tag(s) : Cryptography,Vigenere Variant

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

You have a problem, an idea for a project, a specific need and dCode can not (yet) help you? You need custom development? *Contact-me*!

This page is using the new English version of dCode, *please make comments* !

Sponsored ads

Tool to decrypt/encrypt with Vigenere multiplication. Vigenere Multiplication Cipher is a Vigenere variant which uses a key, but instead of making an addition, it's a multiplication.

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

One takes 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, one starts over the key.

Let the text be 4,3,15,4,5 (for DCODE) and the key be 11,5,25 (for KEY), the result is : 4*11=44, 3*5=15, 15*25=375, 4*11=44, 5*5=25

Decryption requires a key and a numeric text.

Let the ciphered message be 44,15,375,44,25 and the key 11,5,25 (for KEY)

One divides the first number of the message by the second number of the key. One writes the result (which must be integer). Same for the next numbers of the message and the key.

44/11=4, 15/5/= 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.

One can crack vigenere multiplication 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 Multiplication Cipher. Except explicit open source licence (free / freeware), any algorithm, applet, software (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any snippet or function (convert, solve, decrypt, encrypt, decipher, cipher, decode, code, translate) written in PHP (or Java, C#, Python, Javascript, etc.) which dCode owns rights can be transferred after sales quote. So if you need to download the Vigenere Multiplication Cipher script for offline use, for you, your company or association, see you on contact page !

multiplication,multiply,vigenere,time,factor

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

© 2017 dCode — The ultimate 'toolkit' website to solve every problem. dCode