NoctaHash

Memory-hard password hashing algorithm implemented in Rust.

Overview

NoctaHash is a production-grade password hashing system designed to resist GPU, ASIC, and side-channel attacks. It features memory-hardness, time-hardness, and true parallel execution with deterministic results.

Features

• Memory-hardness: Resists GPU/ASIC attacks
• Time-hardness: Configurable computation time
• Hybrid mixing: Data-independent and data-dependent phases
• True parallelism: Multi-threaded execution
• Constant-time operations: Side-channel resistant
• Secure memory management: Automatic zeroization

Installation

Add to Cargo.toml:

[dependencies]
noctahash = "0.1.0"

Usage

use noctahash::{noctahash, verify};

// Create hash
let hash = noctahash("password", None, 3, 64, 4, "base64")?;

// Verify password
let is_valid = verify("password", &hash);

Custom Salt

let salt = b"your_32_byte_salt_here";
let hash = noctahash("password", Some(salt), 3, 64, 4, "base64")?;

Parameters

• time_cost (1-16777216): Number of iterations
• memory_cost_mb (≥1): Memory usage in megabytes
• parallelism (1-255): Number of parallel lanes
• encoding: "base64" or "hex"

Recommended Settings

Hash Format

$noctahash$v=1$t=3,m=64,p=4$<salt>$<hash>

CLI

cargo build --release
./target/release/noctahash <password> [time_cost] [memory_mb] [parallelism]

Security

• Minimum salt length: 16 bytes (recommended: 32 bytes)
• Constant-time comparison
• Secure memory zeroization
• Domain separation for PRF inputs
• Fixed rotation constants (no data-dependent rotations)

Performance

Typical performance on modern hardware:

• t=3, m=64, p=4: ~500ms
• t=2, m=32, p=2: ~150ms
• t=1, m=16, p=1: ~50ms

API

Functions

• noctahash(password, salt, time_cost, memory_mb, parallelism, encoding) - Create hash
• verify(password, hash_string) - Verify password
• NoctaHashCore::new(time_cost, memory_mb, parallelism) - Create core instance
• NoctaHashCore::compute(password, salt) - Compute raw hash

Building

cargo build --release

Testing

cargo test

License

MIT

Author

Tuna4L - GitHub