To sign a message, the originator needs to have a certificate that contains
the public key that will be used by the recipient to validate the signature.
To encrypt a message, the originator need not have a certificate; however,
the recipient will generally not be able to authenticate the source of the
message unless it is signed.
At 04:26 AM 5/8/2002 -0500, Terje Tollisen wrote:
Is the sender of an email required to have a certificate, or is it
sufficient for the sender to have a copy of the certificate of the
recipient? I am thinking of an automated system, where one party will
always be the sender, and never receive emails. In addition, no signatures
are required. Thus nobody will ever actually need the public key for the
automated system. However, I'm uncertain if the sender can send S/MIME
messages without having a certificate of it's own.
Thanks for your time
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