%% You should probably cite rfc8551 instead of this I-D. @techreport{ietf-lamps-rfc5751-bis-03, number = {draft-ietf-lamps-rfc5751-bis-03}, 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-lamps-rfc5751-bis/03/}, author = {Jim Schaad and Blake C. Ramsdell and Sean Turner}, title = {{Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 4.0 Message Specification}}, pagetotal = 57, year = 2017, month = feb, day = 23, abstract = {This document defines Secure/Multipurpose Internet Mail Extensions (S/MIME) version 4.0. S/MIME provides a consistent way to send and receive secure MIME data. Digital signatures provide authentication, message integrity, and non-repudiation with proof of origin. Encryption provides data confidentiality. Compression can be used to reduce data size. This document obsoletes RFC 5751.}, }