Classical Cryptography Simulator

Hash Functions

Explore cryptographic hash functions including SHA family, MD5, and collision resistance. Learn about one-way functions and their security properties.

Hash Calculator
Calculate hash of your text using various algorithms

Secure Hash Algorithm 256-bit

Hash Verification
Verify if text matches a given hash
Control Panel
Hash Function Properties
Essential characteristics of cryptographic hash functions

Deterministic

Same input always produces same output

One-Way Function

Easy to compute, hard to reverse

Avalanche Effect

Small input change causes large output change

Collision Resistant

Hard to find two inputs with same output

Algorithm Comparison
Security and performance characteristics
AlgorithmBitsSecurityStatus
SHA-256256HighSecure
SHA-1160MediumDeprecated
SHA-512512HighSecure
MD5128LowBroken
SHA-3256HighSecure
Hash Function Applications
Where hash functions are used in practice

Data Integrity

  • • File verification
  • • Data deduplication
  • • Backup verification

Security

  • • Password storage
  • • Digital signatures
  • • Blockchain

Networking

  • • TLS/SSL
  • • IPsec
  • • SSH