%% You should probably cite draft-ietf-pkix-sha224 instead of this I-D. @techreport{ietf-pkix-sha244-02, number = {draft-ietf-pkix-sha244-02}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-ietf-pkix-sha244/02/}, author = {Russ Housley}, title = {{A 224-bit One-way Hash Function: SHA-224}}, pagetotal = 6, year = 2003, month = dec, day = 18, abstract = {This document specifies a 224-bit one-way hash function, called SHA-224. A SHA-224 is based on SHA-256, but it uses an different initial value and the result is truncated to 224 bits.}, }