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URL: http://www.ietf.org/rfc/rfc2045.txt
Multipurpose
Internet Mail Extensions (MIME) [RFC2045-RFC2049] extends the format of
Internet mail to allow non-US ASCI textual messages, non-textual messages,
multi-part message bodies, and non-US ASCI information in the headers. The
Secure/MIME (S/MIME) working group is developing specifications, e.g., [RFC
2311], to send and receive secure MIME data, providing the following
cryptographic security services for electronic messaging applications:
authentication, message integrity and non-repudiation of origin (using digital
signatures) and privacy and data security (using encryption).
Keywords:
Security, Mail, Internet, protocol, application layer
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