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About Hash Functions
A hash function converts input data of any size into a fixed-size string of characters. Hash functions are one-way — you cannot reverse-engineer the original input from the hash.
Hash Algorithms
- MD5 — 128-bit hash. Fast but not cryptographically secure. Used for checksums.
- SHA-1 — 160-bit hash. Deprecated for security use but still used in git.
- SHA-256 — 256-bit hash. Part of SHA-2 family. Widely used in security.
- SHA-512 — 512-bit hash. Stronger variant of SHA-256 for higher security.