S/MIME Version 2 Message Specification. - Stephen R. Dussé; Paul E. Hoffman; Blake Ramsdell; Laurence Lundblade; Lisa Repka (RFC, 1998)

S/MIME Version 2 Certificate Handling. - Stephen R. Dussé; Paul E. Hoffman; Blake Ramsdell; Jeff Weinstein (RFC, 1998)

S/MIME Version 3 Certificate Handling. - Blake Ramsdell (RFC, 1999)

S/MIME Version 3 Message Specification. - Blake Ramsdell (RFC, 1999)

Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.1 Certificate Handling. - Blake Ramsdell (RFC, 2004)

Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.1 Message Specification. - Blake Ramsdell (RFC, 2004)

Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.2 Certificate Handling. - Blake Ramsdell; Sean Turner (RFC, 2010)

Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.2 Message Specification. - Blake Ramsdell; Sean Turner (RFC, 2010)

Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 4.0 Certificate Handling. - Jim Schaad; Blake Ramsdell; Sean Turner (RFC, 2019)

Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 4.0 Message Specification. - Jim Schaad; Blake Ramsdell; Sean Turner (RFC, 2019)