2023-07-27 2024-05-22 Specification Required Roberto Polli (primary), Lucas Pardue (secondary) sha-512 Active The SHA-512 algorithm. sha-256 Active The SHA-256 algorithm. md5 Deprecated The MD5 algorithm. It is vulnerable to collision attacks; see NO-MD5 and CMU-836068 sha Deprecated The SHA-1 algorithm. It is vulnerable to collision attacks; see NO-SHA and IACR-2020-014 unixsum Deprecated The algorithm used by the UNIX "sum" command. UNIX unixcksum Deprecated The algorithm used by the UNIX "cksum" command. UNIX adler Deprecated The ADLER32 algorithm. crc32c Deprecated The CRC32c algorithm. RFC9260, Appendix A