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Presentation transcript:

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Homework: certificate Get your free certificate Send a signed and email to me

S/MIME (Secure/Multipurpose Internet Mail Extension) S/MIME: RFC 2630, 2632, 2633 S/MIME header delimiter

S/MIME signature 6-bit block to 8-bit ASCII code Provide reliable delivery across different environment

Signature In SignedData format, including SignerInfo The signer’s public-key certificate Identifier of the message digest algorithm Identifier of the algorithm used to encrypt the message digest The encrypted message digest (signature)