[1] Rhee, Man Young. Internet Security – Cryptographic Principles, Algorithms and Protocols. Editora Wiley.
[2] Internet Mail Consortium. Disponível em: <http://www.imc.org/>. Acessado em: 27/10/2007
[3] S/MIME Mail Security (smime) Charter. Disponível em:
< http://www.ietf.org/html.charters/smime-charter.html>. Acessado em: 27/10/2007
[4] S/MIME Working Group. Disponível em: <http://www.imc.org/ietf-smime/index.html>. Acessado em: 27/10/2007