Installing the S/MIME Certificate on your iOS Device
When you receive your certificate from InCommon, it will be encrypted in the PKCS 12 format (.p12 or .pfx), using the PIN you created for it at the time of request. You will need this PIN to install the certificate.
To use Client Certificates on an iPhone, iPad, or iPod Touch, iOS 5 or later is required.
You should already have your certificate file from InCommon on your personal computer. If you are unable to find your certificate file you can export it from the certificate management application for your computer.
Installing on iOS devices
The next screen will indicate that the profile is "Trusted" and that it has been installed. If the certificate says "Not Trusted", you may not have successfully installed the "InCommon Standard Assurance Client CA" certificate above.
Enabling Client Certificates for iOS Mail
Enabling these options will allow you to digitally sign all e-mail sent from your device. You also have the option to send encrypted e-mail.
Note: The encryption option will attempt to encrypt all correspondence from your iOS device. If you do not have the public certificate for a recipient, the email message will not be encrypted. If you do not want to encrypt all email you send from your device, you should not enable encryption.
E-mail clients not using S/MIME or Client Certificates will not be able to view encrypted e-mail. Clients that cannot use Client Certificates include OWA (Outlook Web Access/ HawkMail) through Chrome, Firefox, and Safari; recipients who use one of these clients will be unable to view encrypted e-mail. All e-mail clients can view signed email.