JSPM

��# Cipher Toolkit Cipher Toolkit is a comprehensive JavaScript library that provides implementations of various classical cryptographic ciphers. Ideal for educational purposes, cryptography enthusiasts, and research, this package offers encryption and decryption methods for popular ciphers. --- ## Features The toolkit currently supports the following ciphers: 1. Additive Cipher A simple substitution cipher where each character in the plaintext is shifted by a fixed number. 2. Affine Cipher A combination of additive and multiplicative ciphers for encryption and decryption. 3. Brute Force Attack A utility to perform brute force decryption by trying all possible keys for supported ciphers. 4. Keyed Transposition Cipher A columnar transposition cipher that uses a key to determine the arrangement of characters. 5. Multiplicative Cipher A substitution cipher that uses multiplication as the transformation. --- ## Installation Install the package using npm: bash npm install cipher-toolkit Usage Importing Functions You can import individual ciphers or all of them at once from the package: javascript Copy code const { encryptAdditive, decryptAdditive, encryptAffine, decryptAffine, bruteForceAdditive, encryptKeyedTransposition, decryptKeyedTransposition, encryptMultiplicative, decryptMultiplicative, } = require('cipher-toolkit'); const { encryptAdditive, decryptAdditive } = require('cipher-toolkit'); const plaintext = "HELLO"; const key = 5; const encrypted = encryptAdditive(plaintext, key); console.log(Encrypted: ${encrypted}); // Output: MJQQT const decrypted = decryptAdditive(encrypted, key); console.log(Decrypted: ${decrypted}); // Output: HELLO ## API Reference Additive Cipher encryptAdditive(plaintext, key): Encrypts a plaintext using the additive cipher. decryptAdditive(ciphertext, key): Decrypts a ciphertext using the additive cipher. Affine Cipher encryptAffine(plaintext, key1, key2): Encrypts a plaintext using the affine cipher. decryptAffine(ciphertext, key1, key2): Decrypts a ciphertext using the affine cipher. Brute Force Attack bruteForceAdditive(ciphertext): Tries all possible keys to decrypt an additive cipher ciphertext. Keyed Transposition Cipher encryptKeyedTransposition(plaintext, key): Encrypts a plaintext using the keyed transposition cipher. decryptKeyedTransposition(ciphertext, key): Decrypts a ciphertext using the keyed transposition cipher. Multiplicative Cipher encryptMultiplicative(plaintext, key): Encrypts a plaintext using the multiplicative cipher. decryptMultiplicative(ciphertext, key): Decrypts a ciphertext using the multiplicative cipher.