What is BLAKE3?
BLAKE3 is a modern cryptographic hash function derived from BLAKE2. It is designed for very high performance and parallelism while maintaining strong security. It produces a default 256-bit hash and supports extendable output length (XOF).
Key characteristics:
- Extendable output length: Can produce hashes of any length
- High performance: Fast and parallelizable on modern CPUs
- Deterministic: The same input always produces the same hash
- Avalanche effect: Small changes in input produce drastically different outputs
- Irreversible: Computationally infeasible to reverse the hash to find the original input
- Collision resistant: Very difficult to find two different inputs that produce the same hash
- Keyed hashing: Supports an optional 32-byte key for MAC functionality
- Key derivation: Can derive subkeys from key material and context
Common uses:
- File integrity verification
- Content-addressed storage and deduplication
- Digital signatures and certificates
- Password storage and authentication
- Cryptographic protocols and systems