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Hash Results
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What is a Hash?
A hash function converts input data of arbitrary size into a fixed-size string of characters. The same input always produces the same output hash, but even a small change in input creates a completely different hash.
Hash Algorithms
- MD5: 128-bit hash. Fast but considered cryptographically broken. Good for checksums.
- SHA-1: 160-bit hash. Also considered weak for security purposes.
- SHA-256: 256-bit hash. Part of SHA-2 family. Currently secure and widely used.
- SHA-512: 512-bit hash. More secure than SHA-256 but produces longer hashes.
Common Uses
- Password storage (with salt)
- File integrity verification
- Digital signatures
- Data deduplication
- Blockchain and cryptocurrency
- Checksums for downloads
Security Note
MD5 and SHA-1 are no longer considered secure for cryptographic purposes. Use SHA-256 or SHA-512 for security-sensitive applications.
Frequently Asked Questions
What is a hash function?
A hash function converts any input data into a fixed-size string of characters. The same input always produces the same output, but even tiny input changes create completely different hashes.
Can I reverse a hash to get the original data?
No, hash functions are one-way. You cannot reverse a hash to recover the original input. This property makes them useful for password storage and data verification.
Which hash algorithm should I use?
Use SHA-256 or SHA-512 for security purposes. MD5 and SHA-1 are outdated and vulnerable to attacks. For simple file checksums, any algorithm works fine.
Are my inputs stored when I generate hashes?
No, all hashing happens locally in your browser. We never store or transmit your data to any server. Your privacy is guaranteed.