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Hash Information
Cryptographic Hashes
- SHA-256, SHA-512: Secure and widely used
- SHA-3: Latest standard, very secure
- BLAKE2: Fast and secure alternative
- Used for password storage, digital signatures
Legacy Hashes
- MD5, SHA-1: Deprecated, not secure
- Vulnerable to collision attacks
- Should not be used for security
- Only for compatibility or non-security uses
Non-Cryptographic
- CRC32: Error detection, not security
- FNV, MurmurHash: Fast hashing
- XXH: Extremely fast hashing
- Used for hash tables, checksums
Hash Security Tips
Secure Hashing
- Use SHA-256 or SHA-512 for security
- Always use salt for password hashing
- Use multiple iterations (PBKDF2, bcrypt)
- Never use MD5 or SHA-1 for security
Password Hashing
- Use bcrypt, scrypt, or Argon2
- Include random salt for each password
- Use high iteration counts
- Consider using dedicated libraries
Common Mistakes
- Using weak hash functions
- Not using salt
- Using too few iterations
- Storing hashes in plain text