Code signing certificates
Code signing certificates enable trust for program files downloaded or updated across the internet. Signing your code enables the receiving party to validate the identity of the code’s author and to know for a fact that this code is bit-for-bit identical to how it was when signed.
Available in Extended Validation and Organization Validation authentication levels, code signing prevents warning messages in popular operating systems and helps end users be confident they’re getting the real thing before they download and install programs.
S/MIME email certificates
Email certificates enable encrypted email and allow recipients to verify the true email address of the sender. These certificates help protect your online identity against use in email spoofing attacks and prevent unwanted third parties from reading the contents of your email.