amculin/vigenere-cipher

Implementation of Vigenere Cipher algorithm in PHP

v1.3 2025-06-25 02:18 UTC

Requires (Dev)

• friendsofphp/php-cs-fixer: ^3.72
• phpstan/phpstan: ^2.1
• phpunit/phpunit: ^11.5
• rector/rector: ^2.0
• vimeo/psalm: ^6.5

MIT

• Fahmi Auliya Tsani

• php
• cryptography
• encryption
• encrypt
• decryption
• decrypt
• vigenere cipher
• classic cryptography

README

Encrypt/decrypt string using Vigenere Cipher algorithm

Instalation

composer require amculin/vigenere-cipher

How to use

Encryption

use amculin\cryptography\classic\VigenereCipher;

$data = 'testtheencryptionprocess';
$key = 'thisisthekey';

//Basic mode only support lowercase alphabet
//You can use alpha_numeric mode for wider supported characters (a-z, A-Z, 0-9)
//You can also use base64 mode to use Radix-64 character list (A-Z, a-z, 0-9, +/=)
$encrypted = VigenereCipher::encrypt($data, $key, 'basic');

echo "Plain text: {$data}\n";
echo "Key: {$key}\n";
echo "Cipher Text: {$encrypted}\n";

Output:

Plain text: testtheencryptionprocess
Key: thisisthekey
Cipher Text: mlalbzxlrmvwiaqgvhkvgowq

Decryption

use amculin\cryptography\classic\VigenereCipher;

$data = 'mlalbzxlrmvwiaqgvhkvgowq';
$key = 'thisisthekey';
$decrypted = VigenereCipher::decrypt($data, $key, 'basic');

echo "Cipher text: {$data}\n";
echo "Key: {$key}\n";
echo "Plain Text: {$decrypted}\n";

Output:

Cipher Text: mlalbzxlrmvwiaqgvhkvgowq
Key: thisisthekey
Plain text: testtheencryptionprocess

Features

• Support basic mode/lowercase alphabet only
• Support alpha-numeric mode (a-z, A-Z, 0-9)
• Unit test
• Comply PHPStan Level 10
• Checked using Psalm
• Optimized using PHP CS Fixer
• Add Base64 mode to support Base64 string

Todos

• Add ASCII mode to support file encryption/decryption