What is SHA-3?

SHA-3 is a cryptographic hash standard based on the Keccak algorithm, designed by Guido Bertoni, Joan Daemen, and others. Published in 2015, SHA-3 is structurally different from SHA-2 (no Merkle–Damgård construction). It provides the same security levels as SHA-2 (e.g., SHA3-256, SHA3-512) with an alternative design that offers resilience against potential future attacks on SHA-2. SHA-3 is increasingly adopted for new systems requiring long-term cryptographic assurance.