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Prime Numbers Cipher

Tool to decrypt/encrypt using prime numbers. The Prime Numbers cipher consists in associating each character a prime number (2, 3, 5, 7, 11, ...)

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Prime Numbers Cipher -

Tag(s) : Substitution Cipher

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# Prime Numbers Cipher

## Prime Numbers Encoder

Tool to decrypt/encrypt using prime numbers. The Prime Numbers cipher consists in associating each character a prime number (2, 3, 5, 7, 11, ...)

### How to encrypt using Prime Numbers cipher?

The encryption uses a correspondence between prime numbers and letters. By default, replace the 26 letters of the alphabet with the 26 first prime numbers (A=2, B=3, C=5, D=7, ..., Z=101).

Example: DCODE is crypted 7,5,47,7,11

### How to decrypt Prime Numbers cipher?

Decryption requires knowing the correspondence used between prime numbers and letters. By default, A = 2, B = 3, C = 5, ...

Example: The cipher message 53,61,23,41,11 will be decrypted into PRIME

### How to recognize a Prime Numbers ciphertext?

The message is only made of prime numbers, mainly the first 26 prime numbers: $2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101$

### What are the variants of the Prime Numbers cipher?

It is possible to define an alternative correspondence (or random) between prime numbers and letters.

Example: Random substitution: A=17, B=43, C=101, D=3, etc.

To decode this alternative, convert the numbers into letters using the decryption form and then perform a monoalphabetical substitution.

The South African Scouts Cipher uses prime numbers that are multiplied together. A prime decomposition is necessary.

Example: 110 = 2*5*11 = A,C,E.

In this case, the order of letters is not necessarily preserved (ACE=2*5*11=110 and ECA=11*5*2=110 too), an anagram generator or a permutations generator is useful to find back the right permutation of letters.

## Source code

dCode retains ownership of the source code of the script Prime Numbers 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 Prime Numbers Cipher script for offline use on PC, iPhone or Android, ask for price quote on contact page !