NtruKem

ntrukem is a NIF C library for Elixir, implementing the post-quantum cryptography algorithm NTRU-HRSS-KEM. This algorithm is a fundamental piece for public-key encryption and secure key establishment in a quantum-resistant future.

What is NTRU-HRSS-KEM?

NTRU-HRSS-KEM is a Key Encapsulation Mechanism (KEM) algorithm that belongs to the family of lattice-based cryptography. It offers robust security against quantum threats, making it a promising solution for protecting long-term communications.

Features

This implementation provides essential functions for handling NTRU-HRSS-KEM:

Feature	Size (bytes)	Description
`Seed`	48	Seed used for key generation.
`Public key`	1138	Public key for encryption.
`Secret key`	1418	Secret key for decryption.
`Ciphertext`	1278	Ciphertext resulting from encapsulation.
`Shared Key`	32	Generated shared symmetric key.

🛠️ Compilation

To compile the NIF library, make sure you have make and erlang-dev installed on your system.

mix deps.get
mix compile

📦 Installation

Add ntrukem to your list of dependencies in mix.exs:

def deps do
  [
    {:ntrukem, "~> 0.1.0"}
  ]
end

Usage

# Generate a key pair
{:ok, pk, sk} = NtruKem.generate_keypair()

# Encapsulate a shared key
{:ok, cipher, shared_key} = NtruKem.encapsulate(pk)

# Decapsulate the shared key
{:ok, sharedkey_dec} = NtruKem.decapsulate(sk, cipher)

# Verify the shared key
IO.puts(sharedkey_dec == shared_key)

🧪 Testing

To run the project tests:

mix run test/ntru_test.exs

📚 More Info

NTRU-HRSS-KEM specification Post-Quantum Cryptography by NIST

⚖️ License

This project is licensed under the MIT License. You can find the full details in the LICENSE file.