Zknh Extension Versions Version 1.0.0 State ratified Ratification date 2021-12 Version 1.0.1 State ratified Ratification date 2022-02 Synopsis Instructions for accelerating the SHA2 family of cryptographic hash functions. Instructions The following instructions are affected by this extension: sha256sig0 No synopsis available sha256sig1 No synopsis available sha256sum0 No synopsis available sha256sum1 No synopsis available