# Scrypt Generator Generate Scrypt hash from password > Canonical page: https://elysiatools.com/en/tools/scrypt-generator - **Category:** Cryptography - **Keywords:** scrypt, hash, password, security, generator, cryptography ## Overview The Scrypt Generator is a secure cryptographic tool designed to derive high-strength hashes from passwords using the memory-hard Scrypt key derivation function. By incorporating configurable parameters like cost, block size, and parallelism, it provides a robust defense against brute-force and hardware-accelerated attacks. ## Inputs - **Password** (text): Enter password to hash... - **Salt (hex)** (text): Enter salt in hex format (leave empty to generate random) - **Cost Factor (N)** (number): CPU/memory cost parameter (1024-1048576, must be power of 2) - **Block Size (r)** (number): Block size parameter (1-32) - **Parallelism (p)** (number): Parallelization parameter (1-16) - **Key Length (bytes)** (number): Derived key length in bytes (16-64) ## When to use - When you need to securely store user passwords in a database using a memory-hard hashing algorithm. - When testing password security strength against specialized hardware-based cracking attempts. - When you require a cryptographically secure key derivation process with customizable memory and CPU overhead. ## How it works - Enter your plain-text password and optionally provide a custom salt in hexadecimal format. - Adjust the cost (N), block size (r), and parallelism (p) parameters to define the desired computational complexity. - Specify the desired output key length in bytes to match your application's security requirements. - Click generate to produce the final Scrypt hash, which can then be used for secure authentication storage. ## Use cases - Securely hashing user passwords for web application authentication systems. - Generating cryptographic keys from passphrases for data encryption workflows. - Benchmarking password hashing performance across different hardware configurations. ## Frequently asked questions ### What is the purpose of the 'Cost Factor' (N)? The cost factor determines the memory and CPU usage required to compute the hash; higher values make the process more resistant to brute-force attacks. ### Should I provide my own salt? Providing a unique, random salt for every password is recommended to prevent rainbow table attacks. If left empty, the tool can generate one for you. ### Why must the cost factor be a power of 2? The Scrypt algorithm requires the cost parameter (N) to be a power of 2 to ensure efficient memory allocation during the hashing process. ### Is this tool secure for production use? This tool is intended for generating hashes for testing or development. For production, ensure you use a trusted, audited cryptographic library in your application code. ### What is the difference between block size and parallelism? Block size (r) controls the memory footprint per iteration, while parallelism (p) controls how many independent threads are used to compute the hash. ## Related tools - [Bcrypt Generator](https://elysiatools.com/en/tools/bcrypt-generator): Generate bcrypt hash from password - [PBKDF2 Generator](https://elysiatools.com/en/tools/pbkdf2-generator): Generate PBKDF2 key derivation hash - [PKCE Code Verifier & Challenge Generator](https://elysiatools.com/en/tools/pkce-code-verifier-generator): Generate, validate and verify OAuth2 / OIDC PKCE (RFC 7636) code_verifier and S256 code_challenge pairs. Three modes: (1) generate a fresh verifier + challenge from cryptographically secure random bytes at 256/384/512/768-bit entropy, (2) audit a verifier you already have against the RFC — length (43–128), charset \[A-Za-z0-9-._~\] and ≥256-bit entropy, and (3) verify a verifier/challenge pair by recomputing BASE64URL(SHA256(verifier)). Optionally build the full authorization-request URL and token-exchange body. 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