PBKDF2 🔑

Overview

This Dart repository implements the Password-Based Key Derivation Function 2 (PBKDF2) as per RFC 8018. PBKDF2 is a widely-used method for deriving cryptographic keys from passwords. It is particularly effective in thwarting brute-force attacks due to its use of salt and variable iteration counts.

PBKDF2

PBKDF2 applies a pseudorandom function, such as HMAC, to the input password along with a salt value and repeats the process multiple times to produce a derived key. This key can then be used for secure data encryption.

Key Features:

• Enhanced Security: Increases resistance against brute-force attacks through the use of salt and iterations.
• Customizable: Allows for the selection of the hash function and adjustment of iteration counts based on security needs.
• Versatile Application: Suitable for a wide range of cryptographic applications, including encryption key generation and password hashing.

Best Practices:

• Use a sufficiently long and random salt to protect against rainbow table attacks.
• Set a high iteration count to increase the time required for brute-force attacks.

Background and History

PBKDF2, standardized in RFC 8018, is an evolution in password-based cryptography, providing a method to safely derive cryptographic keys from passwords.

RFC 8018

RFC 8018 provides comprehensive guidelines on the implementation and usage of PBKDF2. It outlines the algorithm's mechanics, emphasizing security considerations crucial for its effective application.

Usage Examples

Real-World Use Case: Key Generation for Encryption

Scenario: Generating a strong encryption key from a passphrase.

import 'dart:typed_data';
import 'package:pbkdf2/pbkdf2.dart';

Uint8List passphrase = ...; // User-provided passphrase
Uint8List salt = ...; // A unique salt
int iterations = 10000; // Standard iteration count
int keyLength = 32; // Key length for AES encryption

// Generate key
Uint8List encryptionKey = PBKDF2.deriveKey(passphrase, salt, iterations, keyLength);

// Use encryptionKey for cryptographic purposes

Contribution

Contributions to improve the implementation, enhance security, and extend functionality are welcome. If you find any issues or have suggestions, please feel free to open an issue or submit a pull request.