Deniable Encryption Library

This Node.js library provides a way to implement deniable encryption, enabling the encryption of messages in such a manner that the encrypted message can be coerced into revealing a different (plausible) message than the original, without giving away the existence of the original message.

Features

• Deniable Encryption: Encrypt messages in a way that allows for a plausible alternative message to be presented.
• Key Pair Generation: Easily generate encryption and decryption keys.
• Simple API: A straightforward API that makes it easy to integrate deniable encryption into your projects.

Installation

To install the package, run the following command in your project directory:

npm install deniable-encryption

Usage

Here's a quick example to get you started:

import { DeniableEncryption } from 'deniable-encryption'
const originalMessage = 'hello world'
const plausibleMessage = 'goodbye world'
// Generate a key pair
const { publicKey, privateKey } = DeniableEncryption.generateKeyPair()

// Encrypt a message with a plausible alternative
const {
  encryptedOriginalMessage,
  plausibleKeyPair,
  encryptedPlausibleMessage
} = DeniableEncryption.createDeniableEncryption({
  originalMessage,
  plausibleMessage,
  publicKey
})

// Decrypt the message
const decryptedOriginalMessage = DeniableEncryption.decryptWithPrivateKey(
  privateKey,
  encryptedOriginalMessage
)

const decryptedPlausibleMessage = DeniableEncryption.decryptWithPrivateKey(
  plausibleKeyPair.privateKey,
  encryptedPlausibleMessage
)

console.log('Decrypt original message:', decryptedOriginalMessage) // Outputs: hello world
console.log('Decrypt plausible messages:', decryptedPlausibleMessage) // goodbye world

API Reference

generateKeyPair(modulusLength: number = 2048): KeyPair

Generates a public/private key pair for encryption and decryption.

• Parameters
  • modulusLength: The length of the modulus in bits. The default is 2048.
• Returns
  • A KeyPair object containing the publicKey and privateKey.

decryptWithPrivateKey(privateKey: KeyObject, encryptedMessage: string): string

Decrypts an encrypted message using the provided private key.

• Parameters
  • privateKey: The private key used for decryption.
  • encryptedMessage: The encrypted message to be decrypted.
• Returns
  • The decrypted message as a string.

createDeniableEncryption({ originalMessage, plausibleMessage, publicKey, modulusLength }): DeniableEncryptionResult

Creates a deniable encryption result, allowing for plausible deniability.

• Parameters
  • originalMessage: The original message to be encrypted.
  • plausibleMessage: An alternative message that can be plausibly claimed as the original.
  • publicKey: The public key used for encryption.
  • modulusLength: Optional. The length of the modulus in bits. The default is 2048.
• Returns
  • A DeniableEncryptionResult object.

Contributing

We welcome contributions to improve this library. Please feel free to submit a pull request or open an issue.

License

This project is licensed under the MIT License - see the LICENSE file for details.