SHA Hash Generator
Online SHA hash generator supporting SHA-1, SHA-256, SHA-384, SHA-512 algorithms
What is SHA?
SHA (Secure Hash Algorithm) is a family of cryptographic hash functions designed by the NSA and published by NIST as a Federal Information Processing Standard (FIPS).
Key Features
Irreversibility: Cannot derive original data from hash Determinism: Same input always produces same output Avalanche effect: Small input changes cause dramatic output changes Collision resistance: Difficult to find two inputs with same hash
SHA Algorithm Family
SHA-1: Produces 160-bit (20-byte) hash. Proven insecure, not recommended for security-critical applications.
SHA-256: Produces 256-bit (32-byte) hash. SHA-2 family member, widely used in blockchain and cryptography.
SHA-384: Produces 384-bit (48-byte) hash. SHA-2 family member, provides higher security.
SHA-512: Produces 512-bit (64-byte) hash. SHA-2 family member, highest security level.
Use Cases
- Data Integrity: Verify files haven't been tampered with
- Password Storage: Securely store passwords (with salt)
- Digital Signatures: Verify data origin and integrity
- Blockchain: Bitcoin and cryptocurrencies use SHA-256
- File Deduplication: Identify duplicate files by hash
Security Note
SHA-1 has been proven vulnerable to collision attacks and should not be used for security-sensitive scenarios. SHA-256 or higher is recommended. For password storage, use dedicated password hashing algorithms like bcrypt or Argon2.