About securing messages with a digital signature (using S/MIME) at IU

A digital signature is a unique digital mark that verifies that an email message originated from the signer and that it has not been altered. It ensures that a message you're reading has not been changed since it was digitally signed, and that the message was not "spoofed" (sent by an imposter). At Indiana University, the primary means of digitally signing email is to use a digital certificate known as an S/MIME (Secure/Multipurpose Internet Mail Extensions) client certificate.

To use S/MIME certificates to digitally sign your email at IU, you need to:

S/MIME certificates can also be used to send and receive encrypted messages within the IU Exchange system. For more, see About email encryption using S/MIME at IU.

For more about recognizing and verifying a digital signature in a file or email message that you've received, see Microsoft's How to tell if a digital signature is trustworthy.

Note:
Although Microsoft Outlook verifies that the certificate used to sign a message is valid and the message integrity is verified, it does not check to make sure that the "From" address matches the address in the S/MIME certificate. You should remain vigilant in recognizing the warning signs of phishing scams.

If you need help, contact your IT Pro or your campus Support Center.

This is document bctk in the Knowledge Base.
Last modified on 2017-05-16 12:13:14.

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