Example of Encrypted Message

Content-Type: application/pkcs7-mime; smime-type=enveloped-data;

name=smime.p7m

Content-Transfer-Encoding: base64

Content-Disposition: attachment; filename=smime.p7m

rfvbnj756tbBghyHhHUujhJhjH77n8HHGT9HG4VQpfyF467GhIGfHfYT6

7n8HHGghyHhHUujhJh4VQpfyF467GhIGfHfYGTrfvbnjT6jH7756tbB9H

f8HHGTrfvhJhjH776tbB9HG4VQbnj7567GhIGfHfYT6ghyHhHUujpfyF4

0GhIGfHfQbnj756YT64V

Next, we will look insidethe opaque CMS object . . .

Type is “application”

CMS enveloped-data objecthas been “base64” encoded

Subtype is “pkcs7-smime”

Name is “smime.p7m”

S/MIME Type is

“enveloped-data”

RFC 2183

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