Generate modern SHA3-256 hashes with sponge construction.
About
SHA3-256 is a NIST-standardized SHA-3 hash function built on the Keccak-f permutation that produces a 256-bit hash using the sponge construction with 1600-bit state and 24 rounds.
Specifications
Output Size256 bits
StandardFIPS 202
Standard Year2015
Origin Keccak submission to NIST SHA-3 competition
Origin Year 2008
Use Cases
—Next-generation cryptographic systems
—Post-quantum cryptography preparations
—High-assurance security applications
Frequently Asked Questions
SHA3-256 is based on Keccak and has a different internal design than SHA-256 while providing strong security.
SHA3-256 uses the Keccak sponge construction with a 1600-bit internal state and 1088-bit rate, while SHA-256 uses the Merkle-Damgård construction. Keccak's different design provides resilience against length extension attacks natively, and its security proofs are based on different mathematical foundations than SHA-2.
For most applications, SHA-256 remains secure and widely supported. Consider SHA3-256 when: 1) You need diversity in hash algorithms (defense against breaks in SHA-2), 2) Implementing new systems wanting modern algorithms, 3) Specific requirements for SHA-3. Both are secure; SHA-256 has broader ecosystem support.